fix...

FerretDB · Jun 21, 2023 · a798dd4 · a798dd4
1 parent fcf1852
commit a798dd4
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diff --git a/integration/aggregate_documents_compat_test.go b/integration/aggregate_documents_compat_test.go
@@ -1615,7 +1615,6 @@ func TestAggregateCompatProject(t *testing.T) {
 				bson.D{{"$sort", bson.D{{"_id", -1}}}},
 				bson.D{{"$project", bson.D{{"_id", bson.D{{"v", "foo"}}}}}},
 			},
-			resultType: emptyResult,
 		},
 		"DocumentAndValue": {
 			pipeline: bson.A{

diff --git a/internal/handlers/common/aggregations/stages/projection/projection.go b/internal/handlers/common/aggregations/stages/projection/projection.go
@@ -259,6 +259,7 @@ func ProjectDocument(doc, projection *types.Document, inclusion bool) (*types.Do
 				}
 
 				projected.Set("_id", idValue)
+				set = true
 
 				break
 			}
@@ -273,6 +274,7 @@ func ProjectDocument(doc, projection *types.Document, inclusion bool) (*types.Do
 				return nil, err
 			}
 
+			set = true
 			projected.Set("_id", value)
 
 		case *types.Array, string, types.Binary, types.ObjectID,