fixed panic on expanding existing byt non-relation type field

daos/record_expand.go

@@ -58,11 +58,14 @@ func (dao *Dao) expandRecords(records []*models.Record, expandPath string, fetch
 	// extract the relation field (if exist)
 	mainCollection := records[0].Collection()
 	relField := mainCollection.Schema.GetFieldByName(parts[0])
-	if relField == nil {
+	if relField == nil || relField.Type != schema.FieldTypeRelation {
-		return fmt.Errorf("Couldn't find field %q in collection %q.", parts[0], mainCollection.Name)
+		return fmt.Errorf("Couldn't find relation field %q in collection %q.", parts[0], mainCollection.Name)
 	}
 	relField.InitOptions()
-	relFieldOptions, _ := relField.Options.(*schema.RelationOptions)
+	relFieldOptions, ok := relField.Options.(*schema.RelationOptions)
+	if !ok {
+		return fmt.Errorf("Cannot initialize the options of relation field %q.", parts[0])
+	}
 
 	relCollection, err := dao.FindCollectionByNameOrId(relFieldOptions.CollectionId)
 	if err != nil {

daos/record_expand_test.go

@@ -63,7 +63,7 @@ func TestExpandRecords(t *testing.T) {
 			0,
 			2,
 		},
-		// invalid missing first level expand
+		// missing relation field
 		{
 			[]string{"b8ba58f9-e2d7-42a0-b0e7-a11efd98236b", "df55c8ff-45ef-4c82-8aed-6e2183fe1125"},
 			[]string{"invalid"},
@@ -73,7 +73,17 @@ func TestExpandRecords(t *testing.T) {
 			0,
 			1,
 		},
-		// invalid missing second level expand
+		// existing, but non-relation type field
+		{
+			[]string{"b8ba58f9-e2d7-42a0-b0e7-a11efd98236b", "df55c8ff-45ef-4c82-8aed-6e2183fe1125"},
+			[]string{"title"},
+			func(c *models.Collection, ids []string) ([]*models.Record, error) {
+				return app.Dao().FindRecordsByIds(c, ids, nil)
+			},
+			0,
+			1,
+		},
+		// invalid/missing second level expand
 		{
 			[]string{"b8ba58f9-e2d7-42a0-b0e7-a11efd98236b", "df55c8ff-45ef-4c82-8aed-6e2183fe1125"},
 			[]string{"manyrels.invalid"},