Fixed #35022 -- Fixed RenameIndex() crash on unnamed indexes if exists unique constraint on the same fields.

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/migrations/test_operations.py b/tests/migrations/test_operations.py
index 7643111c34..2d9d3a38f0 100644
--- a/tests/migrations/test_operations.py
+++ b/tests/migrations/test_operations.py
@@ -3626,6 +3626,26 @@ class OperationTests(OperationTestBase):
             with self.assertRaisesMessage(ValueError, msg):
                 operation.database_forwards(app_label, editor, project_state, new_state)
 
+    @skipUnlessDBFeature("allows_multiple_constraints_on_same_fields")
+    def test_rename_index_unnamed_index_with_unique_index(self):
+        app_label = "test_rninuniwui"
+        project_state = self.set_up_test_model(
+            app_label,
+            multicol_index=True,
+            unique_together=True,
+        )
+        table_name = app_label + "_pony"
+        self.assertIndexNotExists(table_name, "new_pony_test_idx")
+        operation = migrations.RenameIndex(
+            "Pony", new_name="new_pony_test_idx", old_fields=["pink", "weight"]
+        )
+        new_state = project_state.clone()
+        operation.state_forwards(app_label, new_state)
+        # Rename index.
+        with connection.schema_editor() as editor:
+            operation.database_forwards(app_label, editor, project_state, new_state)
+        self.assertIndexNameExists(table_name, "new_pony_test_idx")
+
     def test_add_index_state_forwards(self):
         project_state = self.set_up_test_model("test_adinsf")
         index = models.Index(fields=["pink"], name="test_adinsf_pony_pink_idx")