feat(issue-search): support query syntax (#9109)

List of currently supported filters: - `is:open` (or `-is:closed`) - `is:closed` (or `-is:open`) - `is:all` - `author:<username>` - `assignee:<username>` - `review:<username>` - `mentions:<username>` - `modified:[>|<]<date>`, where `<date>` is the last update date. - `sort:<by>:[asc|desc]`, where `<by>` is among - created - comments - updated - deadline Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9109 Reviewed-by: 0ko <0ko@noreply.codeberg.org> Reviewed-by: Ellen Εμιλία Άννα Zscheile <fogti@noreply.codeberg.org> Reviewed-by: Gusted <gusted@noreply.codeberg.org> Co-authored-by: Shiny Nematoda <snematoda.751k2@aleeas.com> Co-committed-by: Shiny Nematoda <snematoda.751k2@aleeas.com>
2025-12-07 14:09:47 +00:00 · 2025-11-19 16:05:42 +01:00 · 2025-11-19 16:05:42 +01:00 · 255ed593d3
commit 255ed593d3
parent 4d0c7db6cd
26 changed files with 870 additions and 296 deletions
--- a/build/lint-locale-usage/handle-tmpl.go
+++ b/build/lint-locale-usage/handle-tmpl.go
@ -73,6 +73,12 @@ func (handler Handler) handleTemplateNode(fset *token.FileSet, node tmplParser.N
 			funcname = nodeVar.Ident[2]
 		}

+		if funcname == "IterWithTr" {
+			for i := 2; i < len(nodeCommand.Args); i += 2 {
+				handler.handleTemplateMsgid(fset, nodeCommand.Args[i])
+			}
+		}
+
 		var gotUnexpectedInvoke *int
 		ltf, ok := handler.LocaleTrFunctions[funcname]
 		if !ok {
--- a/modules/indexer/issues/bleve/bleve.go
+++ b/modules/indexer/issues/bleve/bleve.go
@ -9,6 +9,7 @@ import (
 	indexer_internal "forgejo.org/modules/indexer/internal"
 	inner_bleve "forgejo.org/modules/indexer/internal/bleve"
 	"forgejo.org/modules/indexer/issues/internal"
+	"forgejo.org/modules/optional"

 	"github.com/blevesearch/bleve/v2"
 	"github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
@ -154,39 +155,36 @@ func (b *Indexer) Delete(_ context.Context, ids ...int64) error {
 // Search searches for issues by given conditions.
 // Returns the matching issue IDs
 func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (*internal.SearchResult, error) {
-	var queries []query.Query
+	q := bleve.NewBooleanQuery()

-	tokens, err := options.Tokens()
-	if err != nil {
-		return nil, err
-	}
+	for _, token := range options.Tokens {
+		innerQ := bleve.NewDisjunctionQuery(
+			inner_bleve.MatchPhraseQuery(token.Term, "title", issueIndexerAnalyzer, token.Fuzzy, 2.0),
+			inner_bleve.MatchPhraseQuery(token.Term, "content", issueIndexerAnalyzer, token.Fuzzy, 1.0),
+			inner_bleve.MatchPhraseQuery(token.Term, "comments", issueIndexerAnalyzer, token.Fuzzy, 1.0))

-	if len(tokens) > 0 {
-		q := bleve.NewBooleanQuery()
-		for _, token := range tokens {
-			innerQ := bleve.NewDisjunctionQuery(
-				inner_bleve.MatchPhraseQuery(token.Term, "title", issueIndexerAnalyzer, token.Fuzzy, 2.0),
-				inner_bleve.MatchPhraseQuery(token.Term, "content", issueIndexerAnalyzer, token.Fuzzy, 1.0),
-				inner_bleve.MatchPhraseQuery(token.Term, "comments", issueIndexerAnalyzer, token.Fuzzy, 1.0))
-
-			if issueID, err := token.ParseIssueReference(); err == nil {
-				idQuery := inner_bleve.NumericEqualityQuery(issueID, "index")
-				idQuery.SetBoost(20.0)
-				innerQ.AddQuery(idQuery)
-			}
-
-			switch token.Kind {
-			case internal.BoolOptMust:
-				q.AddMust(innerQ)
-			case internal.BoolOptShould:
-				q.AddShould(innerQ)
-			case internal.BoolOptNot:
-				q.AddMustNot(innerQ)
-			}
+		if issueID, err := token.ParseIssueReference(); err == nil {
+			idQuery := inner_bleve.NumericEqualityQuery(issueID, "index")
+			idQuery.SetBoost(20.0)
+			innerQ.AddQuery(idQuery)
+		}
+
+		if len(options.Tokens) == 1 {
+			q.AddMust(innerQ)
+			break
+		}
+
+		switch token.Kind {
+		case internal.BoolOptMust:
+			q.AddMust(innerQ)
+		case internal.BoolOptShould:
+			q.AddShould(innerQ)
+		case internal.BoolOptNot:
+			q.AddMustNot(innerQ)
 		}
-		queries = append(queries, q)
 	}

+	var filters []query.Query
 	if len(options.RepoIDs) > 0 || options.AllPublic {
 		var repoQueries []query.Query
 		for _, repoID := range options.RepoIDs {
@ -195,7 +193,7 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		if options.AllPublic {
 			repoQueries = append(repoQueries, inner_bleve.BoolFieldQuery(true, "is_public"))
 		}
-		queries = append(queries, bleve.NewDisjunctionQuery(repoQueries...))
+		filters = append(filters, bleve.NewDisjunctionQuery(repoQueries...))
 	}

 	if options.PriorityRepoID.Has() {
@ -203,41 +201,36 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		eq.SetBoost(10.0)
 		meh := bleve.NewMatchAllQuery()
 		meh.SetBoost(0)
-		should := bleve.NewDisjunctionQuery(eq, meh)
-		queries = append(queries, should)
+		q.AddShould(bleve.NewDisjunctionQuery(eq, meh))
 	}

 	if options.IsPull.Has() {
-		queries = append(queries, inner_bleve.BoolFieldQuery(options.IsPull.Value(), "is_pull"))
+		filters = append(filters, inner_bleve.BoolFieldQuery(options.IsPull.Value(), "is_pull"))
 	}
 	if options.IsClosed.Has() {
-		queries = append(queries, inner_bleve.BoolFieldQuery(options.IsClosed.Value(), "is_closed"))
+		filters = append(filters, inner_bleve.BoolFieldQuery(options.IsClosed.Value(), "is_closed"))
 	}

 	if options.NoLabelOnly {
-		queries = append(queries, inner_bleve.BoolFieldQuery(true, "no_label"))
+		filters = append(filters, inner_bleve.BoolFieldQuery(true, "no_label"))
 	} else {
 		if len(options.IncludedLabelIDs) > 0 {
 			var includeQueries []query.Query
 			for _, labelID := range options.IncludedLabelIDs {
 				includeQueries = append(includeQueries, inner_bleve.NumericEqualityQuery(labelID, "label_ids"))
 			}
-			queries = append(queries, bleve.NewConjunctionQuery(includeQueries...))
+			filters = append(filters, includeQueries...)
 		} else if len(options.IncludedAnyLabelIDs) > 0 {
 			var includeQueries []query.Query
 			for _, labelID := range options.IncludedAnyLabelIDs {
 				includeQueries = append(includeQueries, inner_bleve.NumericEqualityQuery(labelID, "label_ids"))
 			}
-			queries = append(queries, bleve.NewDisjunctionQuery(includeQueries...))
+			filters = append(filters, bleve.NewDisjunctionQuery(includeQueries...))
 		}
 		if len(options.ExcludedLabelIDs) > 0 {
-			var excludeQueries []query.Query
 			for _, labelID := range options.ExcludedLabelIDs {
-				q := bleve.NewBooleanQuery()
 				q.AddMustNot(inner_bleve.NumericEqualityQuery(labelID, "label_ids"))
-				excludeQueries = append(excludeQueries, q)
 			}
-			queries = append(queries, bleve.NewConjunctionQuery(excludeQueries...))
 		}
 	}

@ -246,48 +239,41 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		for _, milestoneID := range options.MilestoneIDs {
 			milestoneQueries = append(milestoneQueries, inner_bleve.NumericEqualityQuery(milestoneID, "milestone_id"))
 		}
-		queries = append(queries, bleve.NewDisjunctionQuery(milestoneQueries...))
+		filters = append(filters, bleve.NewDisjunctionQuery(milestoneQueries...))
 	}

-	if options.ProjectID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.ProjectID.Value(), "project_id"))
-	}
-	if options.ProjectColumnID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.ProjectColumnID.Value(), "project_board_id"))
-	}
-
-	if options.PosterID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.PosterID.Value(), "poster_id"))
-	}
-
-	if options.AssigneeID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.AssigneeID.Value(), "assignee_id"))
-	}
-
-	if options.MentionID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.MentionID.Value(), "mention_ids"))
-	}
-
-	if options.ReviewedID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.ReviewedID.Value(), "reviewed_ids"))
-	}
-	if options.ReviewRequestedID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.ReviewRequestedID.Value(), "review_requested_ids"))
-	}
-
-	if options.SubscriberID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.SubscriberID.Value(), "subscriber_ids"))
+	for key, val := range map[string]optional.Option[int64]{
+		"project_id":           options.ProjectID,
+		"project_board_id":     options.ProjectColumnID,
+		"poster_id":            options.PosterID,
+		"assignee_id":          options.AssigneeID,
+		"mention_ids":          options.MentionID,
+		"reviewed_ids":         options.ReviewedID,
+		"review_requested_ids": options.ReviewRequestedID,
+		"subscriber_ids":       options.SubscriberID,
+	} {
+		if val.Has() {
+			filters = append(filters, inner_bleve.NumericEqualityQuery(val.Value(), key))
+		}
 	}

 	if options.UpdatedAfterUnix.Has() || options.UpdatedBeforeUnix.Has() {
-		queries = append(queries, inner_bleve.NumericRangeInclusiveQuery(
+		filters = append(filters, inner_bleve.NumericRangeInclusiveQuery(
 			options.UpdatedAfterUnix,
 			options.UpdatedBeforeUnix,
 			"updated_unix"))
 	}

-	var indexerQuery query.Query = bleve.NewConjunctionQuery(queries...)
-	if len(queries) == 0 {
+	switch len(filters) {
+	case 0:
+		break
+	case 1:
+		q.Filter = filters[0]
+	default:
+		q.Filter = bleve.NewConjunctionQuery(filters...)
+	}
+	var indexerQuery query.Query = q
+	if q.Must == nil && q.MustNot == nil && q.Should == nil && len(filters) == 0 {
 		indexerQuery = bleve.NewMatchAllQuery()
 	}

--- a/modules/indexer/issues/db/db.go
+++ b/modules/indexer/issues/db/db.go
@ -5,7 +5,6 @@ package db

 import (
 	"context"
-	"strconv"

 	"forgejo.org/models/db"
 	issue_model "forgejo.org/models/issues"
@ -54,36 +53,34 @@ func (i *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 	cond := builder.NewCond()

 	var priorityIssueIndex int64
-	if options.Keyword != "" {
+	if len(options.Tokens) != 0 {
 		repoCond := builder.In("repo_id", options.RepoIDs)
 		if len(options.RepoIDs) == 1 {
 			repoCond = builder.Eq{"repo_id": options.RepoIDs[0]}
 		}
 		subQuery := builder.Select("id").From("issue").Where(repoCond)

-		cond = builder.Or(
-			db.BuildCaseInsensitiveLike("issue.name", options.Keyword),
-			db.BuildCaseInsensitiveLike("issue.content", options.Keyword),
-			builder.In("issue.id", builder.Select("issue_id").
-				From("comment").
-				Where(builder.And(
-					builder.Eq{"type": issue_model.CommentTypeComment},
-					builder.In("issue_id", subQuery),
-					db.BuildCaseInsensitiveLike("content", options.Keyword),
-				)),
-			),
-		)
-
-		term := options.Keyword
-		if term[0] == '#' || term[0] == '!' {
-			term = term[1:]
-		}
-		if issueID, err := strconv.ParseInt(term, 10, 64); err == nil {
+		for _, token := range options.Tokens {
 			cond = builder.Or(
-				builder.Eq{"`index`": issueID},
-				cond,
+				db.BuildCaseInsensitiveLike("issue.name", token.Term),
+				db.BuildCaseInsensitiveLike("issue.content", token.Term),
+				builder.In("issue.id", builder.Select("issue_id").
+					From("comment").
+					Where(builder.And(
+						builder.Eq{"type": issue_model.CommentTypeComment},
+						builder.In("issue_id", subQuery),
+						db.BuildCaseInsensitiveLike("content", token.Term),
+					)),
+				),
 			)
-			priorityIssueIndex = issueID
+
+			if ref, err := token.ParseIssueReference(); err != nil {
+				cond = builder.Or(
+					builder.Eq{"`index`": ref},
+					cond,
+				)
+				priorityIssueIndex = ref
+			}
 		}
 	}

--- a/modules/indexer/issues/dboptions.go
+++ b/modules/indexer/issues/dboptions.go
@ -4,14 +4,15 @@
 package issues

 import (
+	"context"
+
 	"forgejo.org/models/db"
 	issues_model "forgejo.org/models/issues"
 	"forgejo.org/modules/optional"
 )

-func ToSearchOptions(keyword string, opts *issues_model.IssuesOptions) *SearchOptions {
+func ToSearchOptions(ctx context.Context, keyword string, opts *issues_model.IssuesOptions) *SearchOptions {
 	searchOpt := &SearchOptions{
-		Keyword:   keyword,
 		RepoIDs:   opts.RepoIDs,
 		AllPublic: opts.AllPublic,
 		IsPull:    opts.IsPull,
@ -103,5 +104,7 @@ func ToSearchOptions(keyword string, opts *issues_model.IssuesOptions) *SearchOp
 		searchOpt.SortBy = SortByUpdatedDesc
 	}

+	_ = searchOpt.WithKeyword(ctx, keyword)
+
 	return searchOpt
 }
--- a/modules/indexer/issues/elasticsearch/elasticsearch.go
+++ b/modules/indexer/issues/elasticsearch/elasticsearch.go
@ -149,14 +149,9 @@ func (b *Indexer) Delete(ctx context.Context, ids ...int64) error {
 func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (*internal.SearchResult, error) {
 	query := elastic.NewBoolQuery()

-	tokens, err := options.Tokens()
-	if err != nil {
-		return nil, err
-	}
-
-	if len(tokens) > 0 {
+	if len(options.Tokens) != 0 {
 		q := elastic.NewBoolQuery()
-		for _, token := range tokens {
+		for _, token := range options.Tokens {
 			innerQ := elastic.NewMultiMatchQuery(token.Term, "content", "comments").FieldWithBoost("title", 2.0).TieBreaker(0.5)
 			if token.Fuzzy {
 				// If the term is not a phrase use fuzziness set to AUTO
--- a/modules/indexer/issues/indexer.go
+++ b/modules/indexer/issues/indexer.go
@ -312,7 +312,7 @@ func ParseSortBy(sortBy string, defaultSortBy internal.SortBy) internal.SortBy {
 func SearchIssues(ctx context.Context, opts *SearchOptions) ([]int64, int64, error) {
 	indexer := *globalIndexer.Load()

-	if opts.Keyword == "" {
+	if len(opts.Tokens) == 0 {
 		// This is a conservative shortcut.
 		// If the keyword is empty, db has better (at least not worse) performance to filter issues.
 		// When the keyword is empty, it tends to listing rather than searching issues.
--- a/modules/indexer/issues/indexer_test.go
+++ b/modules/indexer/issues/indexer_test.go
@ -47,44 +47,48 @@ func TestDBSearchIssues(t *testing.T) {

 func searchIssueWithKeyword(t *testing.T) {
 	tests := []struct {
-		opts        SearchOptions
+		keyword     string
+		opts        *SearchOptions
 		expectedIDs []int64
 	}{
 		{
-			SearchOptions{
-				Keyword: "issue2",
+			"issue2",
+			&SearchOptions{
 				RepoIDs: []int64{1},
 			},
 			[]int64{2},
 		},
 		{
-			SearchOptions{
-				Keyword: "first",
+			"first",
+			&SearchOptions{
 				RepoIDs: []int64{1},
 			},
 			[]int64{1},
 		},
 		{
-			SearchOptions{
-				Keyword: "for",
+			"for",
+
+			&SearchOptions{
 				RepoIDs: []int64{1},
 			},
 			[]int64{11, 5, 3, 2, 1},
 		},
 		{
-			SearchOptions{
-				Keyword: "good",
+			"good",
+			&SearchOptions{
 				RepoIDs: []int64{1},
 			},
 			[]int64{1},
 		},
 	}

+	ctx := t.Context()
 	for _, test := range tests {
-		issueIDs, _, err := SearchIssues(t.Context(), &test.opts)
+		require.NoError(t, test.opts.WithKeyword(ctx, test.keyword))
+		issueIDs, _, err := SearchIssues(ctx, test.opts)
 		require.NoError(t, err)

-		assert.Equal(t, test.expectedIDs, issueIDs, test.opts.Keyword)
+		assert.Equal(t, test.expectedIDs, issueIDs, test.keyword)
 	}
 }

@ -152,7 +156,7 @@ func searchIssueByID(t *testing.T) {
 		},
 		{
 			// NOTE: This tests no assignees filtering and also ToSearchOptions() to ensure it will set AssigneeID to 0 when it is passed as -1.
-			opts:        *ToSearchOptions("", &issues.IssuesOptions{AssigneeID: -1}),
+			opts:        *ToSearchOptions(t.Context(), "", &issues.IssuesOptions{AssigneeID: -1}),
 			expectedIDs: []int64{22, 21, 16, 15, 14, 13, 12, 11, 20, 5, 19, 18, 10, 7, 4, 9, 8, 3, 2},
 		},
 		{
--- a/modules/indexer/issues/internal/model.go
+++ b/modules/indexer/issues/internal/model.go
@ -73,7 +73,7 @@ type SearchResult struct {
 // It can handle almost all cases, if there is an exception, we can add a new field, like NoLabelOnly.
 // Unfortunately, we still use db for the indexer and have to convert between db.NoConditionID and nil for legacy reasons.
 type SearchOptions struct {
-	Keyword string // keyword to search
+	Tokens []Token

 	RepoIDs        []int64                // repository IDs which the issues belong to
 	AllPublic      bool                   // if include all public repositories
@ -149,3 +149,28 @@ const (
 	//                    but what if the issue belongs to multiple projects?
 	//                    Since it's unsupported to search issues with keyword in project page, we don't need to support it.
 )
+
+func (s SortBy) ToIssueSort() string {
+	switch s {
+	case SortByScore:
+		return "relevance"
+	case SortByCreatedDesc:
+		return "latest"
+	case SortByCreatedAsc:
+		return "oldest"
+	case SortByUpdatedDesc:
+		return "recentupdate"
+	case SortByUpdatedAsc:
+		return "leastupdate"
+	case SortByCommentsDesc:
+		return "mostcomment"
+	case SortByCommentsAsc:
+		return "leastcomment"
+	case SortByDeadlineAsc:
+		return "nearduedate"
+	case SortByDeadlineDesc:
+		return "farduedate"
+	}
+
+	return "latest"
+}
--- a/modules/indexer/issues/internal/qstring.go
+++ b/modules/indexer/issues/internal/qstring.go
@ -4,9 +4,15 @@
 package internal

 import (
+	"context"
 	"io"
 	"strconv"
 	"strings"
+	"time"
+
+	"forgejo.org/models/user"
+	"forgejo.org/modules/log"
+	"forgejo.org/modules/optional"
 )

 type BoolOpt int
@ -23,6 +29,11 @@ type Token struct {
 	Fuzzy bool
 }

+// Helper function to check if the term starts with a prefix.
+func (tk *Token) IsOf(prefix string) bool {
+	return strings.HasPrefix(tk.Term, prefix) && len(tk.Term) > len(prefix)
+}
+
 func (tk *Token) ParseIssueReference() (int64, error) {
 	term := tk.Term
 	if len(term) > 1 && (term[0] == '#' || term[0] == '!') {
@ -102,23 +113,159 @@ nextEnd:
 	return tk, err
 }

-// Tokenize the keyword
-func (o *SearchOptions) Tokens() (tokens []Token, err error) {
-	if o.Keyword == "" {
-		return nil, nil
+type userFilter int
+
+const (
+	userFilterAuthor userFilter = iota
+	userFilterAssign
+	userFilterMention
+	userFilterReview
+)
+
+// Parses the keyword and sets the
+func (o *SearchOptions) WithKeyword(ctx context.Context, keyword string) (err error) {
+	if keyword == "" {
+		return nil
 	}

-	in := strings.NewReader(o.Keyword)
+	in := strings.NewReader(keyword)
 	it := Tokenizer{in: in}

+	var (
+		tokens     []Token
+		userNames  []string
+		userFilter []userFilter
+	)
+
 	for token, err := it.next(); err == nil; token, err = it.next() {
-		if token.Term != "" {
+		if token.Term == "" {
+			continue
+		}
+
+		// For an exact search (wrapped in quotes)
+		// push the token to the list.
+		if !token.Fuzzy {
+			tokens = append(tokens, token)
+			continue
+		}
+
+		// Otherwise, try to match the token with a preset filter.
+		switch {
+		// is:open  => open & -is:open => closed
+		case token.Term == "is:open":
+			o.IsClosed = optional.Some(token.Kind == BoolOptNot)
+
+		// Similarly, is:closed & -is:closed
+		case token.Term == "is:closed":
+			o.IsClosed = optional.Some(token.Kind != BoolOptNot)
+
+		// The rest of the presets MUST NOT be a negation.
+		case token.Kind == BoolOptNot:
+			tokens = append(tokens, token)
+
+		// is:all: Do not consider -is:all.
+		case token.Term == "is:all":
+			o.IsClosed = optional.None[bool]()
+
+		// sort:<by>:[ asc | desc ],
+		case token.IsOf("sort:"):
+			o.SortBy = parseSortBy(token.Term[5:])
+
+		// modified:[ < | > ]<date>.
+		// for example, modified:>2025-08-29
+		case token.IsOf("modified:"):
+			switch token.Term[9] {
+			case '>':
+				o.UpdatedAfterUnix = toUnix(token.Term[10:])
+			case '<':
+				o.UpdatedBeforeUnix = toUnix(token.Term[10:])
+			default:
+				t := toUnix(token.Term[9:])
+				o.UpdatedAfterUnix = t
+				o.UpdatedBeforeUnix = t
+			}
+
+		// for user filter's
+		// append the names and roles
+		case token.IsOf("author:"):
+			userNames = append(userNames, token.Term[7:])
+			userFilter = append(userFilter, userFilterAuthor)
+		case token.IsOf("assignee:"):
+			userNames = append(userNames, token.Term[9:])
+			userFilter = append(userFilter, userFilterAssign)
+		case token.IsOf("review:"):
+			userNames = append(userNames, token.Term[7:])
+			userFilter = append(userFilter, userFilterReview)
+		case token.IsOf("mentions:"):
+			userNames = append(userNames, token.Term[9:])
+			userFilter = append(userFilter, userFilterMention)
+
+		default:
 			tokens = append(tokens, token)
 		}
 	}
 	if err != nil && err != io.EOF {
-		return nil, err
+		return err
 	}

-	return tokens, nil
+	o.Tokens = tokens
+
+	ids, err := user.GetUserIDsByNames(ctx, userNames, true)
+	if err != nil {
+		return err
+	}
+
+	for i, id := range ids {
+		// Skip all invalid IDs.
+		// Hopefully this won't be too astonishing for the user.
+		if id <= 0 {
+			continue
+		}
+		val := optional.Some(id)
+		switch userFilter[i] {
+		case userFilterAuthor:
+			o.PosterID = val
+		case userFilterAssign:
+			o.AssigneeID = val
+		case userFilterReview:
+			o.ReviewedID = val
+		case userFilterMention:
+			o.MentionID = val
+		}
+	}
+
+	return nil
+}
+
+func toUnix(value string) optional.Option[int64] {
+	time, err := time.Parse(time.DateOnly, value)
+	if err != nil {
+		log.Warn("Failed to parse date '%v'", err)
+		return optional.None[int64]()
+	}
+
+	return optional.Some(time.Unix())
+}
+
+func parseSortBy(sortBy string) SortBy {
+	switch sortBy {
+	case "created:asc":
+		return SortByCreatedAsc
+	case "created:desc":
+		return SortByCreatedDesc
+	case "comments:asc":
+		return SortByCommentsAsc
+	case "comments:desc":
+		return SortByCommentsDesc
+	case "updated:asc":
+		return SortByUpdatedAsc
+	case "updated:desc":
+		return SortByUpdatedDesc
+	case "deadline:asc":
+		return SortByDeadlineAsc
+	case "deadline:desc":
+		return SortByDeadlineDesc
+	default:
+		return SortByScore
+	}
 }
--- a/modules/indexer/issues/internal/qstring_test.go
+++ b/modules/indexer/issues/internal/qstring_test.go
@ -4,8 +4,13 @@
 package internal

 import (
+	"context"
 	"testing"

+	"forgejo.org/models/unittest"
+	"forgejo.org/models/user"
+	"forgejo.org/modules/optional"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@ -252,12 +257,177 @@ var testOpts = []testIssueQueryStringOpt{

 func TestIssueQueryString(t *testing.T) {
 	var opt SearchOptions
+	ctx := t.Context()
 	for _, res := range testOpts {
-		t.Run(opt.Keyword, func(t *testing.T) {
-			opt.Keyword = res.Keyword
-			tokens, err := opt.Tokens()
-			require.NoError(t, err)
-			assert.Equal(t, res.Results, tokens)
+		t.Run(res.Keyword, func(t *testing.T) {
+			require.NoError(t, opt.WithKeyword(ctx, res.Keyword))
+			assert.Equal(t, res.Results, opt.Tokens)
+		})
+	}
+}
+
+func TestMain(m *testing.M) {
+	unittest.MainTest(m)
+}
+
+func TestIssueQueryStringWithFilters(t *testing.T) {
+	// we don't need all the fixures
+	// insert only one single test user
+	require.NoError(t, user.CreateUser(t.Context(), &user.User{
+		ID:        2,
+		Name:      "test",
+		LowerName: "test",
+		Email:     "test@localhost",
+	}))
+
+	for _, c := range []struct {
+		Keyword string
+		Opts    *SearchOptions
+	}{
+		// Generic Cases
+		{
+			Keyword: "modified:>2025-08-28",
+			Opts: &SearchOptions{
+				UpdatedAfterUnix: optional.Some(int64(1756339200)),
+			},
+		},
+		{
+			Keyword: "modified:<2025-08-28",
+			Opts: &SearchOptions{
+				UpdatedBeforeUnix: optional.Some(int64(1756339200)),
+			},
+		},
+		{
+			Keyword: "modified:>2025-08-28 modified:<2025-08-28",
+			Opts: &SearchOptions{
+				UpdatedAfterUnix:  optional.Some(int64(1756339200)),
+				UpdatedBeforeUnix: optional.Some(int64(1756339200)),
+			},
+		},
+		{
+			Keyword: "modified:2025-08-28",
+			Opts: &SearchOptions{
+				UpdatedAfterUnix:  optional.Some(int64(1756339200)),
+				UpdatedBeforeUnix: optional.Some(int64(1756339200)),
+			},
+		},
+		{
+			Keyword: "assignee:test",
+			Opts: &SearchOptions{
+				AssigneeID: optional.Some(int64(2)),
+			},
+		},
+		{
+			Keyword: "assignee:test hi",
+			Opts: &SearchOptions{
+				AssigneeID: optional.Some(int64(2)),
+				Tokens: []Token{
+					{
+						Term:  "hi",
+						Kind:  BoolOptShould,
+						Fuzzy: true,
+					},
+				},
+			},
+		},
+		{
+			Keyword: "mentions:test",
+			Opts: &SearchOptions{
+				MentionID: optional.Some(int64(2)),
+			},
+		},
+		{
+			Keyword: "review:test",
+			Opts: &SearchOptions{
+				ReviewedID: optional.Some(int64(2)),
+			},
+		},
+		{
+			Keyword: "author:test",
+			Opts: &SearchOptions{
+				PosterID: optional.Some(int64(2)),
+			},
+		},
+		{
+			Keyword: "sort:updated:asc",
+			Opts: &SearchOptions{
+				SortBy: SortByUpdatedAsc,
+			},
+		},
+		{
+			Keyword: "sort:test",
+			Opts: &SearchOptions{
+				SortBy: SortByScore,
+			},
+		},
+		{
+			Keyword: "test author:test mentions:test modified:<2025-08-28 sort:comments:desc",
+			Opts: &SearchOptions{
+				Tokens: []Token{
+					{
+						Term:  "test",
+						Kind:  BoolOptShould,
+						Fuzzy: true,
+					},
+				},
+				MentionID:         optional.Some(int64(2)),
+				PosterID:          optional.Some(int64(2)),
+				UpdatedBeforeUnix: optional.Some(int64(1756339200)),
+				SortBy:            SortByCommentsDesc,
+			},
+		},
+
+		// Edge Cases
+		{
+			Keyword: "author:",
+			Opts: &SearchOptions{
+				Tokens: []Token{
+					{
+						Term:  "author:",
+						Kind:  BoolOptShould,
+						Fuzzy: true,
+					},
+				},
+			},
+		},
+		{
+			Keyword: "author:testt",
+			Opts:    &SearchOptions{},
+		},
+		{
+			Keyword: "author: test",
+			Opts: &SearchOptions{
+				Tokens: []Token{
+					{
+						Term:  "author:",
+						Kind:  BoolOptShould,
+						Fuzzy: true,
+					},
+					{
+						Term:  "test",
+						Kind:  BoolOptShould,
+						Fuzzy: true,
+					},
+				},
+			},
+		},
+		{
+			Keyword: "modified:",
+			Opts: &SearchOptions{
+				Tokens: []Token{
+					{
+						Term:  "modified:",
+						Kind:  BoolOptShould,
+						Fuzzy: true,
+					},
+				},
+			},
+		},
+	} {
+		t.Run(c.Keyword, func(t *testing.T) {
+			opts := &SearchOptions{}
+			require.NoError(t, opts.WithKeyword(context.Background(), c.Keyword))
+			assert.Equal(t, c.Opts, opts)
 		})
 	}
 }
--- a/modules/indexer/issues/internal/tests/tests.go
+++ b/modules/indexer/issues/internal/tests/tests.go
@ -63,6 +63,7 @@ func TestIndexer(t *testing.T, indexer internal.Indexer) {
 				}()
 			}

+			require.NoError(t, c.SearchOptions.WithKeyword(t.Context(), c.Keyword))
 			result, err := indexer.Search(t.Context(), c.SearchOptions)
 			require.NoError(t, err)

@ -99,38 +100,34 @@ var cases = []*testIndexerCase{
 		Expected:      allResults,
 	},
 	{
-		Name: "empty keyword",
-		SearchOptions: &internal.SearchOptions{
-			Keyword: "",
-		},
-		Expected: allResults,
+		Name:          "empty keyword",
+		Keyword:       "",
+		SearchOptions: &internal.SearchOptions{},
+		Expected:      allResults,
 	},
 	{
-		Name: "whitespace keyword",
-		SearchOptions: &internal.SearchOptions{
-			Keyword: "    ",
-		},
-		Expected: allResults,
+		Name:          "whitespace keyword",
+		Keyword:       "    ",
+		SearchOptions: &internal.SearchOptions{},
+		Expected:      allResults,
 	},
 	{
-		Name: "dangling slash in keyword",
-		SearchOptions: &internal.SearchOptions{
-			Keyword: "\\",
-		},
-		Expected: allResults,
+		Name:          "dangling slash in keyword",
+		Keyword:       "\\",
+		SearchOptions: &internal.SearchOptions{},
+		Expected:      allResults,
 	},
 	{
-		Name: "dangling quote in keyword",
-		SearchOptions: &internal.SearchOptions{
-			Keyword: "\"",
-		},
-		Expected: allResults,
+		Name:    "dangling quote in keyword",
+		Keyword: "\"",
+
+		SearchOptions: &internal.SearchOptions{},
+		Expected:      allResults,
 	},
 	{
-		Name: "empty",
-		SearchOptions: &internal.SearchOptions{
-			Keyword: "f1dfac73-fda6-4a6b-b8a4-2408fcb8ef69",
-		},
+		Name:          "empty",
+		Keyword:       "f1dfac73-fda6-4a6b-b8a4-2408fcb8ef69",
+		SearchOptions: &internal.SearchOptions{},
 		ExpectedIDs:   []int64{},
 		ExpectedTotal: 0,
 	},
@ -153,9 +150,9 @@ var cases = []*testIndexerCase{
 			{ID: 1001, Content: "hi hello world"},
 			{ID: 1002, Comments: []string{"hi", "hello world"}},
 		},
+		Keyword: "hello",
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "hello",
-			SortBy:  internal.SortByCreatedDesc,
+			SortBy: internal.SortByCreatedDesc,
 		},
 		ExpectedIDs:   []int64{1002, 1001, 1000},
 		ExpectedTotal: 3,
@ -167,9 +164,9 @@ var cases = []*testIndexerCase{
 			{ID: 1001, Content: "hi hello world"},
 			{ID: 1002, Comments: []string{"hello", "hello world"}},
 		},
+		Keyword: "hello world -hi",
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "hello world -hi",
-			SortBy:  internal.SortByCreatedDesc,
+			SortBy: internal.SortByCreatedDesc,
 		},
 		ExpectedIDs:   []int64{1002},
 		ExpectedTotal: 1,
@ -181,9 +178,9 @@ var cases = []*testIndexerCase{
 			{ID: 1001, Content: "hi hello world"},
 			{ID: 1002, Comments: []string{"hi", "hello world"}},
 		},
+		Keyword: "hello world",
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "hello world",
-			SortBy:  internal.SortByCreatedDesc,
+			SortBy: internal.SortByCreatedDesc,
 		},
 		ExpectedIDs:   []int64{1002, 1001, 1000},
 		ExpectedTotal: 3,
@ -199,8 +196,8 @@ var cases = []*testIndexerCase{
 			{ID: 1006, Title: "hello world", RepoID: 4, IsPublic: false},
 			{ID: 1007, Title: "hello world", RepoID: 5, IsPublic: false},
 		},
+		Keyword: "hello",
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "hello",
 			SortBy:  internal.SortByCreatedDesc,
 			RepoIDs: []int64{1, 4},
 		},
@ -218,8 +215,8 @@ var cases = []*testIndexerCase{
 			{ID: 1006, Title: "hello world", RepoID: 4, IsPublic: false},
 			{ID: 1007, Title: "hello world", RepoID: 5, IsPublic: false},
 		},
+		Keyword: "hello",
 		SearchOptions: &internal.SearchOptions{
-			Keyword:   "hello",
 			SortBy:    internal.SortByCreatedDesc,
 			RepoIDs:   []int64{1, 4},
 			AllPublic: true,
@ -300,8 +297,9 @@ var cases = []*testIndexerCase{
 			{ID: 1003, Title: "hello d", LabelIDs: []int64{2000}},
 			{ID: 1004, Title: "hello e", LabelIDs: []int64{}},
 		},
+		Keyword: "hello",
+
 		SearchOptions: &internal.SearchOptions{
-			Keyword:          "hello",
 			IncludedLabelIDs: []int64{2000, 2001},
 			ExcludedLabelIDs: []int64{2003},
 		},
@ -317,8 +315,9 @@ var cases = []*testIndexerCase{
 			{ID: 1003, Title: "hello d", LabelIDs: []int64{2002}},
 			{ID: 1004, Title: "hello e", LabelIDs: []int64{}},
 		},
+		Keyword: "hello",
+
 		SearchOptions: &internal.SearchOptions{
-			Keyword:             "hello",
 			IncludedAnyLabelIDs: []int64{2001, 2002},
 			ExcludedLabelIDs:    []int64{2003},
 		},
@ -580,9 +579,9 @@ var cases = []*testIndexerCase{
 		},
 	},
 	{
-		Name: "Index",
+		Name:    "Index",
+		Keyword: "13",
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "13",
 			SortBy:  internal.SortByScore,
 			RepoIDs: []int64{5},
 		},
@ -590,9 +589,10 @@ var cases = []*testIndexerCase{
 		ExpectedTotal: 1,
 	},
 	{
-		Name: "Index with prefix",
+		Name:    "Index with prefix",
+		Keyword: "#13",
+
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "#13",
 			SortBy:  internal.SortByScore,
 			RepoIDs: []int64{5},
 		},
@ -605,8 +605,9 @@ var cases = []*testIndexerCase{
 			{ID: 1001, Title: "re #13", RepoID: 5},
 			{ID: 1002, Title: "re #1001", Content: "leave 13 alone. - 13", RepoID: 5},
 		},
+		Keyword: "!13",
+
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "!13",
 			SortBy:  internal.SortByScore,
 			RepoIDs: []int64{5},
 		},
@ -621,9 +622,10 @@ var cases = []*testIndexerCase{
 			{ID: 1003, Index: 103, Title: "Brrr", RepoID: 5},
 			{ID: 1004, Index: 104, Title: "Brrr", RepoID: 5},
 		},
+		Keyword: "Brrr -101 -103",
+
 		SearchOptions: &internal.SearchOptions{
-			Keyword: "Brrr -101 -103",
-			SortBy:  internal.SortByScore,
+			SortBy: internal.SortByScore,
 		},
 		ExpectedIDs:   []int64{1002, 1004},
 		ExpectedTotal: 2,
@ -797,6 +799,7 @@ type testIndexerCase struct {
 	Name      string
 	ExtraData []*internal.IndexerData

+	Keyword       string
 	SearchOptions *internal.SearchOptions

 	Expected      func(t *testing.T, data map[int64]*internal.IndexerData, result *internal.SearchResult) // if nil, use ExpectedIDs, ExpectedTotal
--- a/modules/indexer/issues/meilisearch/meilisearch.go
+++ b/modules/indexer/issues/meilisearch/meilisearch.go
@ -233,12 +233,8 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 	}

 	var keywords []string
-	if options.Keyword != "" {
-		tokens, err := options.Tokens()
-		if err != nil {
-			return nil, err
-		}
-		for _, token := range tokens {
+	if len(options.Tokens) != 0 {
+		for _, token := range options.Tokens {
 			if !token.Fuzzy {
 				// to make it a phrase search, we have to quote the keyword(s)
 				// https://www.meilisearch.com/docs/reference/api/search#phrase-search
--- a/modules/templates/util_string.go
+++ b/modules/templates/util_string.go
@ -9,6 +9,7 @@ import (
 	"strings"

 	"forgejo.org/modules/base"
+	"forgejo.org/modules/util"
 )

 type StringUtils struct{}
@ -70,3 +71,11 @@ func (su *StringUtils) EllipsisString(s string, max int) string {
 func (su *StringUtils) ToUpper(s string) string {
 	return strings.ToUpper(s)
 }
+
+func (su *StringUtils) RemoveAll(s string, all ...string) string {
+	return util.RemoveAllStr(s, false, all...)
+}
+
+func (su *StringUtils) RemoveAllPrefix(s string, all ...string) string {
+	return util.RemoveAllStr(s, true, all...)
+}
--- a/modules/translation/translation.go
+++ b/modules/translation/translation.go
@ -6,6 +6,7 @@ package translation
 import (
 	"context"
 	"html/template"
+	"iter"
 	"sort"
 	"strings"
 	"sync"
@ -327,6 +328,16 @@ func (l *locale) PrettyNumber(v any) string {
 	return l.msgPrinter.Sprintf("%v", number.Decimal(v))
 }

+func (l *locale) IterWithTr(kvs ...string) iter.Seq2[string, template.HTML] {
+	return func(yield func(string, template.HTML) bool) {
+		for i := 0; i < len(kvs); i += 2 {
+			if !yield(kvs[i], l.TrHTML(kvs[i+1])) {
+				return
+			}
+		}
+	}
+}
+
 func GetPluralRule(l Locale) int {
 	return GetPluralRuleImpl(l.Language())
 }
--- a/modules/util/string.go
+++ b/modules/util/string.go
@ -3,7 +3,11 @@

 package util

-import "unsafe"
+import (
+	"slices"
+	"strings"
+	"unsafe"
+)

 func isSnakeCaseUpper(c byte) bool {
 	return 'A' <= c && c <= 'Z'
@ -117,3 +121,37 @@ func ASCIILower(b byte) byte {
 	}
 	return b
 }
+
+func RemoveAllStr(s string, prefix bool, all ...string) string {
+	if len(s) == 0 {
+		return ""
+	}
+
+	sb, first := strings.Builder{}, true
+	for field := range strings.FieldsSeq(s) {
+		if hasAny(field, prefix, all...) {
+			continue
+		}
+		if first {
+			first = false
+			goto write
+		}
+		sb.WriteRune(' ')
+	write:
+		sb.WriteString(field)
+	}
+	return sb.String()
+}
+
+func hasAny(s string, prefix bool, all ...string) bool {
+	if !prefix {
+		return slices.Contains(all, s)
+	}
+
+	for _, field := range all {
+		if strings.HasPrefix(s, field) {
+			return true
+		}
+	}
+	return false
+}
--- a/modules/util/string_test.go
+++ b/modules/util/string_test.go
@ -71,3 +71,46 @@ func TestASCIIEqualFold(t *testing.T) {
 		})
 	}
 }
+
+func TestRemoveAllStr(t *testing.T) {
+	for name, c := range map[string]struct {
+		str, res string
+		prefix   bool
+		all      []string
+	}{
+		"Empty": {
+			str:    "",
+			res:    "",
+			all:    []string{"hello"},
+			prefix: false,
+		},
+		"Exact": {
+			str:    "hello",
+			res:    "",
+			all:    []string{"hello"},
+			prefix: false,
+		},
+		"One of Two": {
+			str:    "hello world",
+			res:    "world",
+			all:    []string{"hello"},
+			prefix: false,
+		},
+		"Prefix": {
+			str:    "is:open is:closed hello",
+			res:    "hello",
+			all:    []string{"is:"},
+			prefix: true,
+		},
+		"Prefix Multiple": {
+			str:    "is:open is:closed hello has:fun",
+			res:    "hello",
+			all:    []string{"is:", "has:"},
+			prefix: true,
+		},
+	} {
+		t.Run(name, func(t *testing.T) {
+			assert.Equal(t, c.res, RemoveAllStr(c.str, c.prefix, c.all...))
+		})
+	}
+}
--- a/options/locale_next/locale_en-US.json
+++ b/options/locale_next/locale_en-US.json
@ -56,6 +56,12 @@
    "relativetime.2months": "two months ago",
    "relativetime.1year": "last year",
    "relativetime.2years": "two years ago",
+    "repo.issues.filter_poster.hint": "Filter by the author",
+    "repo.issues.filter_assignee.hint": "Filter by assigned user",
+    "repo.issues.filter_reviewers.hint": "Filter by reviewed user",
+    "repo.issues.filter_mention.hint": "Filter by mentioned user",
+    "repo.issues.filter_modified.hint": "Filter by last modified date",
+    "repo.issues.filter_sort.hint": "Filter by sort type: created/comments/updated/deadline",
    "repo.pulls.poster_manage_approval": "Manage approval",
    "repo.pulls.poster_requires_approval": "Some workflows are <a href=\"%[1]s\">waiting to be reviewed.</a>",
    "repo.pulls.poster_requires_approval.tooltip": "The author of this pull request is not trusted to run workflows triggered by a pull request created from a forked repository or with AGit. The workflows triggered by a `pull_request` event will not run until they are approved.",
@ -93,6 +99,7 @@
    "migrate.forgejo.description": "Migrate data from codeberg.org or other Forgejo instances.",
    "repo.issue_indexer.title": "Issue Indexer",
    "search.milestone_kind": "Search milestones…",
+    "search.syntax": "Search syntax",
    "repo.settings.push_mirror.branch_filter.label": "Branch filter (optional)",
    "repo.settings.push_mirror.branch_filter.description": "Branches to be mirrored. Leave blank to mirror all branches. See <a href=\"%[1]s\">%[2]s documentation</a> for syntax. Examples: <code>main, release/*</code>",
    "incorrect_root_url": "This Forgejo instance is configured to be served on \"%s\". You are currently viewing Forgejo through a different URL, which may cause parts of the application to break. The canonical URL is controlled by Forgejo admins via the ROOT_URL setting in the app.ini.",
--- a/routers/api/v1/repo/issue.go
+++ b/routers/api/v1/repo/issue.go
@ -275,7 +275,6 @@ func SearchIssues(ctx *context.APIContext) {
 			PageSize: limit,
 			Page:     ctx.FormInt("page"),
 		},
-		Keyword:             keyword,
 		RepoIDs:             repoIDs,
 		AllPublic:           allPublic,
 		IsPull:              isPull,
@ -285,6 +284,11 @@ func SearchIssues(ctx *context.APIContext) {
 		SortBy:              issue_indexer.ParseSortBy(ctx.FormString("sort"), issue_indexer.SortByCreatedDesc),
 	}

+	if err := searchOpt.WithKeyword(ctx, keyword); err != nil {
+		ctx.Error(http.StatusInternalServerError, "WithKeyword", err)
+		return
+	}
+
 	if since != 0 {
 		searchOpt.UpdatedAfterUnix = optional.Some(since)
 	}
@ -519,12 +523,15 @@ func ListIssues(ctx *context.APIContext) {

 	searchOpt := &issue_indexer.SearchOptions{
 		Paginator: &listOptions,
-		Keyword:   keyword,
 		RepoIDs:   []int64{ctx.Repo.Repository.ID},
 		IsPull:    isPull,
 		IsClosed:  isClosed,
 		SortBy:    issue_indexer.ParseSortBy(ctx.FormString("sort"), issue_indexer.SortByCreatedDesc),
 	}
+	if err := searchOpt.WithKeyword(ctx, keyword); err != nil {
+		ctx.Error(http.StatusInternalServerError, "WithKeyword", err)
+		return
+	}
 	if since != 0 {
 		searchOpt.UpdatedAfterUnix = optional.Some(since)
 	}
--- a/routers/web/repo/issue.go
+++ b/routers/web/repo/issue.go
@ -217,7 +217,7 @@ func issues(ctx *context.Context, milestoneID, projectID int64, isPullOption opt
 		IssueIDs:          nil,
 	}
 	if keyword != "" {
-		allIssueIDs, err := issueIDsFromSearch(ctx, keyword, statsOpts)
+		allIssueIDs, _, err := issueIDsFromSearch(ctx, keyword, statsOpts)
 		if err != nil {
 			if issue_indexer.IsAvailable(ctx) {
 				ctx.ServerError("issueIDsFromSearch", err)
@ -285,7 +285,7 @@ func issues(ctx *context.Context, milestoneID, projectID int64, isPullOption opt

 	var issues issues_model.IssueList
 	{
-		ids, err := issueIDsFromSearch(ctx, keyword, &issues_model.IssuesOptions{
+		ids, opts, err := issueIDsFromSearch(ctx, keyword, &issues_model.IssuesOptions{
 			Paginator: &db.ListOptions{
 				Page:     pager.Paginater.Current(),
 				PageSize: setting.UI.IssuePagingNum,
@ -316,6 +316,13 @@ func issues(ctx *context.Context, milestoneID, projectID int64, isPullOption opt
 			ctx.ServerError("GetIssuesByIDs", err)
 			return
 		}
+
+		// The values of these parameters may have been changed
+		// depending on the query syntax
+		isShowClosed = opts.IsClosed
+		sortType = opts.SortBy.ToIssueSort()
+		posterID = opts.PosterID.Value()
+		assigneeID = opts.AssigneeID.Value()
 	}

 	approvalCounts, err := issues.GetApprovalCounts(ctx)
@ -439,6 +446,8 @@ func issues(ctx *context.Context, milestoneID, projectID int64, isPullOption opt
 		return
 	}

+	cleanedKeyword := util.RemoveAllStr(keyword, false, "is:open", "-is:open", "is:closed", "-is:closed", "is:all")
+
 	ctx.Data["PinnedIssues"] = pinned
 	ctx.Data["IsRepoAdmin"] = ctx.IsSigned && (ctx.Repo.IsAdmin() || ctx.Doer.IsAdmin)
 	ctx.Data["IssueStats"] = issueStats
@ -447,13 +456,13 @@ func issues(ctx *context.Context, milestoneID, projectID int64, isPullOption opt
 	ctx.Data["AllCount"] = issueStats.AllCount
 	linkStr := "?q=%s&type=%s&sort=%s&state=%s&labels=%s&milestone=%d&project=%d&assignee=%d&poster=%d&archived=%t"
 	ctx.Data["AllStatesLink"] = fmt.Sprintf(linkStr,
-		url.QueryEscape(keyword), url.QueryEscape(viewType), url.QueryEscape(sortType), "all", url.QueryEscape(selectLabels),
+		url.QueryEscape(cleanedKeyword), url.QueryEscape(viewType), url.QueryEscape(sortType), "all", url.QueryEscape(selectLabels),
 		milestoneID, projectID, assigneeID, posterID, archived)
 	ctx.Data["OpenLink"] = fmt.Sprintf(linkStr,
-		url.QueryEscape(keyword), url.QueryEscape(viewType), url.QueryEscape(sortType), "open", url.QueryEscape(selectLabels),
+		url.QueryEscape(cleanedKeyword), url.QueryEscape(viewType), url.QueryEscape(sortType), "open", url.QueryEscape(selectLabels),
 		milestoneID, projectID, assigneeID, posterID, archived)
 	ctx.Data["ClosedLink"] = fmt.Sprintf(linkStr,
-		url.QueryEscape(keyword), url.QueryEscape(viewType), url.QueryEscape(sortType), "closed", url.QueryEscape(selectLabels),
+		url.QueryEscape(cleanedKeyword), url.QueryEscape(viewType), url.QueryEscape(sortType), "closed", url.QueryEscape(selectLabels),
 		milestoneID, projectID, assigneeID, posterID, archived)
 	ctx.Data["SelLabelIDs"] = labelIDs
 	ctx.Data["SelectLabels"] = selectLabels
@ -489,12 +498,17 @@ func issues(ctx *context.Context, milestoneID, projectID int64, isPullOption opt
 	ctx.Data["Page"] = pager
 }

-func issueIDsFromSearch(ctx *context.Context, keyword string, opts *issues_model.IssuesOptions) ([]int64, error) {
-	ids, _, err := issue_indexer.SearchIssues(ctx, issue_indexer.ToSearchOptions(keyword, opts))
+func issueIDsFromSearch(
+	ctx *context.Context,
+	keyword string,
+	opts *issues_model.IssuesOptions,
+) ([]int64, *issue_indexer.SearchOptions, error) {
+	searchOpts := issue_indexer.ToSearchOptions(ctx, keyword, opts)
+	ids, _, err := issue_indexer.SearchIssues(ctx, searchOpts)
 	if err != nil {
-		return nil, fmt.Errorf("SearchIssues: %w", err)
+		return nil, searchOpts, fmt.Errorf("SearchIssues: %w", err)
 	}
-	return ids, nil
+	return ids, searchOpts, nil
 }

 // Issues render issues page
@ -2759,7 +2773,6 @@ func SearchIssues(ctx *context.Context) {
 			Page:     ctx.FormInt("page"),
 			PageSize: limit,
 		},
-		Keyword:             keyword,
 		RepoIDs:             repoIDs,
 		AllPublic:           allPublic,
 		IsPull:              isPull,
@ -2769,6 +2782,11 @@ func SearchIssues(ctx *context.Context) {
 		ProjectID:           projectID,
 		SortBy:              issue_indexer.ParseSortBy(ctx.FormString("sort"), issue_indexer.SortByCreatedDesc),
 	}
+	if err := searchOpt.WithKeyword(ctx, keyword); err != nil {
+		log.Error("WithKeyword: %v", err)
+		ctx.Error(http.StatusInternalServerError)
+		return
+	}

 	if since != 0 {
 		searchOpt.UpdatedAfterUnix = optional.Some(since)
@ -2932,13 +2950,18 @@ func ListIssues(ctx *context.Context) {
 			Page:     ctx.FormInt("page"),
 			PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
 		},
-		Keyword:   keyword,
 		RepoIDs:   []int64{ctx.Repo.Repository.ID},
 		IsPull:    isPull,
 		IsClosed:  isClosed,
 		ProjectID: projectID,
 		SortBy:    issue_indexer.ParseSortBy(ctx.FormString("sort"), issue_indexer.SortByCreatedDesc),
 	}
+	if err := searchOpt.WithKeyword(ctx, keyword); err != nil {
+		log.Error("WithKeyword: %v", err)
+		ctx.Error(http.StatusInternalServerError)
+		return
+	}
+
 	if since != 0 {
 		searchOpt.UpdatedAfterUnix = optional.Some(since)
 	}
--- a/routers/web/user/home.go
+++ b/routers/web/user/home.go
@ -592,7 +592,7 @@ func buildIssueOverview(ctx *context.Context, unitType unit.Type) {
 	// USING FINAL STATE OF opts FOR A QUERY.
 	var issues issues_model.IssueList
 	{
-		issueIDs, _, err := issue_indexer.SearchIssues(ctx, issue_indexer.ToSearchOptions(keyword, opts))
+		issueIDs, _, err := issue_indexer.SearchIssues(ctx, issue_indexer.ToSearchOptions(ctx, keyword, opts))
 		if err != nil {
 			ctx.ServerError("issueIDsFromSearch", err)
 			return
@ -613,11 +613,14 @@ func buildIssueOverview(ctx *context.Context, unitType unit.Type) {
 	// -------------------------------
 	// Fill stats to post to ctx.Data.
 	// -------------------------------
-	issueStats, err := getUserIssueStats(ctx, ctxUser, filterMode, issue_indexer.ToSearchOptions(keyword, opts))
+	searchOpts := issue_indexer.ToSearchOptions(ctx, keyword, opts)
+	issueStats, err := getUserIssueStats(ctx, ctxUser, filterMode, searchOpts)
 	if err != nil {
 		ctx.ServerError("getUserIssueStats", err)
 		return
 	}
+	isShowClosed = searchOpts.IsClosed.ValueOrDefault(isShowClosed)
+	sortType = searchOpts.SortBy.ToIssueSort()

 	// Will be posted to ctx.Data.
 	var shownIssues int
@ -670,10 +673,16 @@ func buildIssueOverview(ctx *context.Context, unitType unit.Type) {
 	ctx.Data["SelectLabels"] = selectedLabels
 	ctx.Data["PageIsOrgIssues"] = org != nil

+	state := "open"
 	if isShowClosed {
-		ctx.Data["State"] = "closed"
-	} else {
-		ctx.Data["State"] = "open"
+		state = "closed"
+	}
+	ctx.Data["State"] = state
+
+	ctx.SetFormString("state", state)
+	if searchOpts.AssigneeID.Has() {
+		id := strconv.FormatInt(searchOpts.AssigneeID.Value(), 10)
+		ctx.SetFormString("assignee", id)
 	}

 	pager := context.NewPagination(shownIssues, setting.UI.IssuePagingNum, page, 5)
--- a/templates/repo/issue/filter_list.tmpl
+++ b/templates/repo/issue/filter_list.tmpl
@ -82,7 +82,7 @@
 <div class="list-header-author ui dropdown jump item user-remote-search" data-tooltip-content="{{ctx.Locale.Tr "repo.author_search_tooltip"}}"
 	data-search-url="{{if .Milestone}}{{$.RepoLink}}/issues/posters{{else}}{{$.Link}}/posters{{end}}"
 	data-selected-user-id="{{$.PosterID}}"
-	data-action-jump-url="?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={user_id}{{if $.ShowArchivedLabels}}&archived=true{{end}}"
+	data-action-jump-url="?q={{StringUtils.RemoveAllPrefix $.Keyword "author:"}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={user_id}{{if $.ShowArchivedLabels}}&archived=true{{end}}"
 >
 	<span class="text">
 		{{ctx.Locale.Tr "repo.issues.filter_poster"}}
@ -108,11 +108,12 @@
 			<i class="icon">{{svg "octicon-search" 16}}</i>
 			<input type="text" placeholder="{{ctx.Locale.Tr "repo.issues.filter_assignee"}}">
 		</div>
-		<a rel="nofollow" class="{{if not .AssigneeID}}active selected {{end}}item" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee=&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_select"}}</a>
-		<a rel="nofollow" class="{{if eq .AssigneeID -1}}active selected {{end}}item" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee=-1&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_assignee"}}</a>
+		{{$keyword := StringUtils.RemoveAllPrefix $.Keyword "assignee:"}}
+		<a rel="nofollow" class="{{if not .AssigneeID}}active selected {{end}}item" href="?q={{$keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee=&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_select"}}</a>
+		<a rel="nofollow" class="{{if eq .AssigneeID -1}}active selected {{end}}item" href="?q={{$keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee=-1&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_assginee_no_assignee"}}</a>
 		<div class="divider"></div>
 		{{range .Assignees}}
-			<a rel="nofollow" class="{{if eq $.AssigneeID .ID}}active selected{{end}} item tw-flex" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{.ID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
+			<a rel="nofollow" class="{{if eq $.AssigneeID .ID}}active selected{{end}} item tw-flex" href="?q={{$keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{$.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{.ID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">
 				{{ctx.AvatarUtils.Avatar . 20}}{{template "repo/search_name" .}}
 			</a>
 		{{end}}
@ -146,11 +147,12 @@
 	</span>
 	{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 	<div class="menu">
-		<a rel="nofollow" class="{{if or (eq .SortType "relevance") (not .SortType)}}active {{end}}item" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort=relevency&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.relevance"}}</a>
+		{{$keyword := StringUtils.RemoveAllPrefix $.Keyword "sort:"}}
+		<a rel="nofollow" class="{{if or (eq .SortType "relevance") (not .SortType)}}active {{end}}item" href="?q={{$keyword}}&type={{$.ViewType}}&sort=relevency&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.relevance"}}</a>
 		{{$o := .}}
 		{{range $opt := StringUtils.Make "latest" "oldest" "recentupdate" "leastupdate" "mostcomment" "leastcomment" "nearduedate" "farduedate"}}
 			{{$text := ctx.Locale.Tr (printf "repo.issues.filter_sort.%s" $opt)}}
-			<a rel="nofollow" class="{{if eq $o.SortType $opt}}active {{end}}item" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$opt}}&state={{$.State}}&labels={{$o.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{$text}}</a>
+			<a rel="nofollow" class="{{if eq $o.SortType $opt}}active {{end}}item" href="?q={{$keyword}}&type={{$.ViewType}}&sort={{$opt}}&state={{$.State}}&labels={{$o.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{$text}}</a>
 		{{end}}
 	</div>
 </div>
--- a/templates/repo/issue/search.tmpl
+++ b/templates/repo/issue/search.tmpl
@ -18,4 +18,7 @@
 			{{template "shared/search/combo" dict "Value" .Keyword "Placeholder" (ctx.Locale.Tr "search.issue_kind") "Tooltip" (ctx.Locale.Tr "explore.go_to")}}
 		{{end}}
 	</div>
+	{{if not .PageIsMilestones}}
+		{{template "shared/search/issue/syntax"}}
+	{{end}}
 </form>
--- a/templates/shared/search/issue/syntax.tmpl
+++ b/templates/shared/search/issue/syntax.tmpl
@ -0,0 +1,31 @@
+<a class="ui icon tw-px-4 tw-py-2 show-modal" data-modal="#search-syntax-modal">{{svg "octicon-question"}}</a>
+<dialog id="search-syntax-modal">
+	<article>
+		<header>{{ctx.Locale.Tr "search.syntax"}}</header>
+		<div class="content">
+			<table class="tw-table-auto">
+				<tbody>
+					{{range $filter, $tr :=
+						ctx.Locale.IterWithTr
+							"is:open" "repo.issues.open_title"
+							"is:closed" "repo.issues.closed_title"
+							"is:all" "repo.issues.all_title"
+							"author:<username>" "repo.issues.filter_poster.hint"
+							"assignee:<username>" "repo.issues.filter_assignee.hint"
+							"review:<username>" "repo.issues.filter_reviewers.hint"
+							"mentions:<username>" "repo.issues.filter_mention.hint"
+							"sort:<by>:[asc|desc]" "repo.issues.filter_sort.hint"
+							"modified:[>|<]<date>" "repo.issues.filter_modified.hint"}}
+						<tr>
+							<th class="tw-p-2"><code>{{$filter}}</code></th>
+							<td class="tw-p-2">{{$tr | SafeHTML}}</td>
+						</tr>
+					{{end}}
+				</tbody>
+			</table>
+		</div>
+		<footer class="actions">
+				<button class="ui button icon cancel">{{ctx.Locale.Tr "settings.cancel"}}</button>
+		</footer>
+	</article>
+</dialog>
--- a/templates/user/dashboard/issues.tmpl
+++ b/templates/user/dashboard/issues.tmpl
@ -5,11 +5,12 @@
 		{{template "base/alert" .}}
 		<div class="list-header">
 			<div class="switch list-header-toggle">
-				<a class="item{{if not .IsShowClosed}} active{{end}}" href="?type={{$.ViewType}}&sort={{$.SortType}}&state=open&labels={{.SelectLabels}}&q={{$.Keyword}}">
+				{{$keyword := StringUtils.RemoveAll $.Keyword "is:open" "-is:open" "is:closed" "-is:closed" "is:all"}}
+				<a class="item{{if not .IsShowClosed}} active{{end}}" href="?type={{$.ViewType}}&sort={{$.SortType}}&state=open&labels={{.SelectLabels}}&q={{$keyword}}">
 					{{svg "octicon-issue-opened" 16}}
 					{{ctx.Locale.PrettyNumber .IssueStats.OpenCount}}&nbsp;{{ctx.Locale.Tr "repo.issues.open_title"}}
 				</a>
-				<a class="item{{if .IsShowClosed}} active{{end}}" href="?type={{$.ViewType}}&sort={{$.SortType}}&state=closed&labels={{.SelectLabels}}&q={{$.Keyword}}">
+				<a class="item{{if .IsShowClosed}} active{{end}}" href="?type={{$.ViewType}}&sort={{$.SortType}}&state=closed&labels={{.SelectLabels}}&q={{$keyword}}">
 					{{svg "octicon-issue-closed" 16}}
 					{{ctx.Locale.PrettyNumber .IssueStats.ClosedCount}}&nbsp;{{ctx.Locale.Tr "repo.issues.closed_title"}}
 				</a>
@ -19,12 +20,17 @@
 					<input type="hidden" name="type" value="{{$.ViewType}}">
 					<input type="hidden" name="sort" value="{{$.SortType}}">
 					<input type="hidden" name="state" value="{{$.State}}">
+					{{$placeholder := ctx.Locale.Tr "search.issue_kind"}}
 					{{if .PageIsPulls}}
-						{{template "shared/search/combo" dict "Value" $.Keyword "Placeholder" (ctx.Locale.Tr "search.pull_kind") "Tooltip" (ctx.Locale.Tr "explore.go_to")}}
-					{{else}}
-						{{template "shared/search/combo" dict "Value" $.Keyword "Placeholder" (ctx.Locale.Tr "search.issue_kind") "Tooltip" (ctx.Locale.Tr "explore.go_to")}}
+						{{$placeholder = ctx.Locale.Tr "search.pull_kind"}}
 					{{end}}
+					{{template "shared/search/combo"
+						dict
+							"Value" $.Keyword
+							"Placeholder" $placeholder
+							"Tooltip" (ctx.Locale.Tr "explore.go_to")}}
 				</div>
+				{{template "shared/search/issue/syntax"}}
 			</form>
 			<div class="ui secondary menu tw-mt-0">
 				<!-- Label -->
@ -73,10 +79,11 @@
 						{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 					</span>
 					<div class="menu">
+						{{$keyword := StringUtils.RemoveAllPrefix $.Keyword "sort:"}}
 						{{$o := .}}
 						{{range $opt := StringUtils.Make "recentupdate" "leastupdate" "latest" "oldest" "mostcomment" "leastcomment" "nearduedate" "farduedate"}}
 							{{$text := ctx.Locale.Tr (printf "repo.issues.filter_sort.%s" $opt)}}
-							<a class="{{if or (eq $o.SortType $opt) (and (eq $opt "latest") (not $o.SortType))}}active {{end}}item" href="?type={{$.ViewType}}&sort={{$opt}}&state={{$.State}}&labels={{$o.SelectLabels}}&q={{$.Keyword}}">{{
+							<a class="{{if or (eq $o.SortType $opt) (and (eq $opt "latest") (not $o.SortType))}}active {{end}}item" href="?type={{$.ViewType}}&sort={{$opt}}&state={{$.State}}&labels={{$o.SelectLabels}}&q={{$keyword}}">{{
 								$text
 							}}</a>
 						{{end}}
--- a/tests/integration/issue_test.go
+++ b/tests/integration/issue_test.go
@ -108,25 +108,27 @@ func TestViewIssuesSortByType(t *testing.T) {
 	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})

 	session := loginUser(t, user.Name)
-	req := NewRequest(t, "GET", repo.Link()+"/issues?type=created_by")
-	resp := session.MakeRequest(t, req, http.StatusOK)
+	for _, path := range []string{"/issues?type=created_by", "/issues?q=sort:created:asc"} {
+		req := NewRequest(t, "GET", repo.Link()+path)
+		resp := session.MakeRequest(t, req, http.StatusOK)

-	htmlDoc := NewHTMLParser(t, resp.Body)
-	issuesSelection := getIssuesSelection(t, htmlDoc)
-	expectedNumIssues := unittest.GetCount(t,
-		&issues_model.Issue{RepoID: repo.ID, PosterID: user.ID},
-		unittest.Cond("is_closed=?", false),
-		unittest.Cond("is_pull=?", false),
-	)
-	if expectedNumIssues > setting.UI.IssuePagingNum {
-		expectedNumIssues = setting.UI.IssuePagingNum
+		htmlDoc := NewHTMLParser(t, resp.Body)
+		issuesSelection := getIssuesSelection(t, htmlDoc)
+		expectedNumIssues := unittest.GetCount(t,
+			&issues_model.Issue{RepoID: repo.ID, PosterID: user.ID},
+			unittest.Cond("is_closed=?", false),
+			unittest.Cond("is_pull=?", false),
+		)
+		if expectedNumIssues > setting.UI.IssuePagingNum {
+			expectedNumIssues = setting.UI.IssuePagingNum
+		}
+		assert.Equal(t, expectedNumIssues, issuesSelection.Length())
+
+		issuesSelection.Each(func(_ int, selection *goquery.Selection) {
+			issue := getIssue(t, repo.ID, selection)
+			assert.Equal(t, user.ID, issue.PosterID)
+		})
 	}
-	assert.Equal(t, expectedNumIssues, issuesSelection.Length())
-
-	issuesSelection.Each(func(_ int, selection *goquery.Selection) {
-		issue := getIssue(t, repo.ID, selection)
-		assert.Equal(t, user.ID, issue.PosterID)
-	})
 }

 func TestViewIssuesKeyword(t *testing.T) {
@ -192,6 +194,15 @@ func TestViewIssuesSearchOptions(t *testing.T) {
 		assert.Equal(t, 3, issuesSelection.Length())
 	})

+	t.Run("All issues keyword override", func(t *testing.T) {
+		// Keyword should override the state parameter
+		req := NewRequestf(t, "GET", "%s/issues?q=is:all&state=open", repo.Link())
+		resp := MakeRequest(t, req, http.StatusOK)
+		htmlDoc := NewHTMLParser(t, resp.Body)
+		issuesSelection := getIssuesSelection(t, htmlDoc)
+		assert.Equal(t, 3, issuesSelection.Length())
+	})
+
 	t.Run("Issues with no project", func(t *testing.T) {
 		req := NewRequestf(t, "GET", "%s/issues?state=all&project=-1", repo.Link())
 		resp := MakeRequest(t, req, http.StatusOK)
@ -855,90 +866,122 @@ func TestSearchIssues(t *testing.T) {
 		expectedIssueCount = setting.UI.IssuePagingNum
 	}

-	link, _ := url.Parse("/issues/search")
-	req := NewRequest(t, "GET", link.String())
+	req := NewRequest(t, "GET", "/issues/search")
 	resp := session.MakeRequest(t, req, http.StatusOK)
 	var apiIssues []*api.Issue
 	DecodeJSON(t, resp, &apiIssues)
 	assert.Len(t, apiIssues, expectedIssueCount)

-	since := "2000-01-01T00:50:01+00:00" // 946687801
-	before := time.Unix(999307200, 0).Format(time.RFC3339)
-	query := url.Values{}
-	query.Add("since", since)
-	query.Add("before", before)
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 11)
-	query.Del("since")
-	query.Del("before")
+	t.Run("By Query Params", func(t *testing.T) {
+		link, _ := url.Parse("/issues/search")
+		since := "2000-01-01T00:50:01+00:00" // 946687801
+		before := time.Unix(999307200, 0).Format(time.RFC3339)
+		query := url.Values{}
+		query.Add("since", since)
+		query.Add("before", before)
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 11)
+		query.Del("since")
+		query.Del("before")

-	query.Add("state", "closed")
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 2)
+		query.Add("state", "closed")
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 2)

-	query.Set("state", "all")
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Equal(t, "22", resp.Header().Get("X-Total-Count"))
-	assert.Len(t, apiIssues, 20)
+		query.Set("state", "all")
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Equal(t, "22", resp.Header().Get("X-Total-Count"))
+		assert.Len(t, apiIssues, 20)

-	query.Add("limit", "5")
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Equal(t, "22", resp.Header().Get("X-Total-Count"))
-	assert.Len(t, apiIssues, 5)
+		query.Add("limit", "5")
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Equal(t, "22", resp.Header().Get("X-Total-Count"))
+		assert.Len(t, apiIssues, 5)

-	query = url.Values{"assigned": {"true"}, "state": {"all"}}
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 2)
+		query = url.Values{"assigned": {"true"}, "state": {"all"}}
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 2)

-	query = url.Values{"milestones": {"milestone1"}, "state": {"all"}}
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 1)
+		query = url.Values{"milestones": {"milestone1"}, "state": {"all"}}
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 1)

-	query = url.Values{"milestones": {"milestone1,milestone3"}, "state": {"all"}}
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 2)
+		query = url.Values{"milestones": {"milestone1,milestone3"}, "state": {"all"}}
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 2)

-	query = url.Values{"owner": {"user2"}} // user
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 8)
+		query = url.Values{"owner": {"user2"}} // user
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 8)

-	query = url.Values{"owner": {"org3"}} // organization
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 5)
+		query = url.Values{"owner": {"org3"}} // organization
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 5)

-	query = url.Values{"owner": {"org3"}, "team": {"team1"}} // organization + team
-	link.RawQuery = query.Encode()
-	req = NewRequest(t, "GET", link.String())
-	resp = session.MakeRequest(t, req, http.StatusOK)
-	DecodeJSON(t, resp, &apiIssues)
-	assert.Len(t, apiIssues, 2)
+		query = url.Values{"owner": {"org3"}, "team": {"team1"}} // organization + team
+		link.RawQuery = query.Encode()
+		req = NewRequest(t, "GET", link.String())
+		resp = session.MakeRequest(t, req, http.StatusOK)
+		DecodeJSON(t, resp, &apiIssues)
+		assert.Len(t, apiIssues, 2)
+	})
+
+	t.Run("By Keyword", func(t *testing.T) {
+		link, _ := url.Parse("/issues/search")
+		for keyword, len := range map[string]int{
+			"modified:>2000-01-01 modified:<2001-09-02": 11,
+			"is:closed":             2,
+			"is:all":                20,
+			"is:all assignee:user2": 2,
+		} {
+			q := url.Values{"q": {keyword}}
+			link.RawQuery = q.Encode()
+			req = NewRequest(t, "GET", link.String())
+			resp = session.MakeRequest(t, req, http.StatusOK)
+			DecodeJSON(t, resp, &apiIssues)
+			assert.Len(t, apiIssues, len, "keyword: %v", keyword)
+		}
+	})
+
+	t.Run("Filter + Keyword", func(t *testing.T) {
+		link, _ := url.Parse("/issues/search")
+		exec := func(q url.Values, len int) {
+			link.RawQuery = q.Encode()
+			req = NewRequest(t, "GET", link.String())
+			resp = session.MakeRequest(t, req, http.StatusOK)
+			DecodeJSON(t, resp, &apiIssues)
+			assert.Len(t, apiIssues, len, "query: %v", q.Encode())
+		}
+		exec(url.Values{"milestones": {"milestone1"}, "keyword": {"is:all"}}, 1)
+		exec(url.Values{"assigned": {"true"}, "keyword": {"is:all"}}, 2)
+	})
 }

 func TestSearchIssuesWithLabels(t *testing.T) {
@ -985,6 +1028,14 @@ func TestSearchIssuesWithLabels(t *testing.T) {

 	// org and repo label
 	query.Set("labels", "label2,orglabel4")
+	query.Add("q", "is:all")
+	link.RawQuery = query.Encode()
+	req = NewRequest(t, "GET", link.String())
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	DecodeJSON(t, resp, &apiIssues)
+	assert.Len(t, apiIssues, 2)
+	query.Del("q")
+
 	query.Add("state", "all")
 	link.RawQuery = query.Encode()
 	req = NewRequest(t, "GET", link.String())
--- a/web_src/css/repo/list-header.css
+++ b/web_src/css/repo/list-header.css
@ -18,6 +18,7 @@
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
+  gap: .5rem;
  min-width: 200px; /* to enable flexbox wrapping on mobile */
 }