Try fixing your unit tests

modules/indexer/issues/bleve/bleve.go

@@ -241,9 +241,14 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		queries = append(queries, bleve.NewDisjunctionQuery(milestoneQueries...))
 	}
 
-	if options.ProjectID.Has() {
-		queries = append(queries, inner_bleve.NumericEqualityQuery(options.ProjectID.Value(), "project_id"))
+	if len(options.ProjectIDs) > 0 {
+		var projectQueries []query.Query
+		for _, projectID := range options.ProjectIDs {
+			projectQueries = append(projectQueries, inner_bleve.NumericEqualityQuery(projectID, "project_id"))
+		}
+		queries = append(queries, bleve.NewDisjunctionQuery(projectQueries...))
 	}
+
 	if options.ProjectColumnID.Has() {
 		queries = append(queries, inner_bleve.NumericEqualityQuery(options.ProjectColumnID.Value(), "project_board_id"))
 	}

modules/indexer/issues/db/options.go

@@ -65,7 +65,6 @@ func ToDBOptions(ctx context.Context, options *internal.SearchOptions) (*issue_m
 		ReviewRequestedID:  convertID(options.ReviewRequestedID),
 		ReviewedID:         convertID(options.ReviewedID),
 		SubscriberID:       convertID(options.SubscriberID),
-		ProjectID:          convertID(options.ProjectID),
 		ProjectColumnID:    convertID(options.ProjectColumnID),
 		IsClosed:           options.IsClosed,
 		IsPull:             options.IsPull,
@@ -88,6 +87,10 @@ func ToDBOptions(ctx context.Context, options *internal.SearchOptions) (*issue_m
 		opts.MilestoneIDs = options.MilestoneIDs
 	}
 
+	if len(options.ProjectIDs) > 0 {
+		opts.ProjectIDs = options.ProjectIDs
+	}
+
 	if options.NoLabelOnly {
 		opts.LabelIDs = []int64{0} // Be careful, it's zero, not db.NoConditionID
 	} else {

modules/indexer/issues/dboptions.go

@@ -46,10 +46,8 @@ func ToSearchOptions(keyword string, opts *issues_model.IssuesOptions) *SearchOp
 		searchOpt.MilestoneIDs = opts.MilestoneIDs
 	}
 
-	if opts.ProjectID > 0 {
-		searchOpt.ProjectID = optional.Some(opts.ProjectID)
-	} else if opts.ProjectID == db.NoConditionID { // FIXME: this is inconsistent from other places
-		searchOpt.ProjectID = optional.Some[int64](0) // Those issues with no project(projectid==0)
+	if len(opts.ProjectIDs) > 0 {
+		searchOpt.ProjectIDs = opts.ProjectIDs
 	}
 
 	searchOpt.AssigneeID = opts.AssigneeID

modules/indexer/issues/elasticsearch/elasticsearch.go

@@ -204,8 +204,8 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		query.Must(elastic.NewTermsQuery("milestone_id", toAnySlice(options.MilestoneIDs)...))
 	}
 
-	if options.ProjectID.Has() {
-		query.Must(elastic.NewTermQuery("project_id", options.ProjectID.Value()))
+	if len(options.ProjectIDs) > 0 {
+		query.Must(elastic.NewTermsQuery("project_id", toAnySlice(options.ProjectIDs)...))
 	}
 	if options.ProjectColumnID.Has() {
 		query.Must(elastic.NewTermQuery("project_board_id", options.ProjectColumnID.Value()))

modules/indexer/issues/internal/model.go

@@ -94,7 +94,7 @@ type SearchOptions struct {
 
 	MilestoneIDs []int64 // milestones the issues have
 
-	ProjectID       optional.Option[int64] // project the issues belong to
+	ProjectIDs      []int64                // project the issues belong to
 	ProjectColumnID optional.Option[int64] // project column the issues belong to
 
 	PosterID   string // poster of the issues, "(none)" or "(any)" or a user ID

modules/indexer/issues/internal/tests/tests.go

@@ -307,7 +307,7 @@ var cases = []*testIndexerCase{
 			Paginator: &db.ListOptions{
 				PageSize: 5,
 			},
-			ProjectID: optional.Some(int64(1)),
+			ProjectIDs: []int64{1},
 		},
 		Expected: func(t *testing.T, data map[int64]*internal.IndexerData, result *internal.SearchResult) {
 			assert.Len(t, result.Hits, 5)
@@ -325,7 +325,7 @@ var cases = []*testIndexerCase{
 			Paginator: &db.ListOptions{
 				PageSize: 5,
 			},
-			ProjectID: optional.Some(int64(0)),
+			ProjectIDs: []int64{0},
 		},
 		Expected: func(t *testing.T, data map[int64]*internal.IndexerData, result *internal.SearchResult) {
 			assert.Len(t, result.Hits, 5)

modules/indexer/issues/meilisearch/meilisearch.go

@@ -180,8 +180,8 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		query.And(inner_meilisearch.NewFilterIn("milestone_id", options.MilestoneIDs...))
 	}
 
-	if options.ProjectID.Has() {
-		query.And(inner_meilisearch.NewFilterEq("project_id", options.ProjectID.Value()))
+	if len(options.ProjectIDs) > 0 {
+		query.And(inner_meilisearch.NewFilterIn("project_id", options.ProjectIDs...))
 	}
 	if options.ProjectColumnID.Has() {
 		query.And(inner_meilisearch.NewFilterEq("project_board_id", options.ProjectColumnID.Value()))