[1.7.x] Fixed #23013 -- Fixed removing unique_together/index_together constraints in migrations.

Thanks melinath for the report.

Backport of 0154965392 from master

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/migrations/test_operations.py b/tests/migrations/test_operations.py
index 63e9946e1e..0091ec4e59 100644
--- a/tests/migrations/test_operations.py
+++ b/tests/migrations/test_operations.py
@@ -899,6 +899,10 @@ class OperationTests(OperationTestBase):
         operation.state_forwards("test_alunto", new_state)
         self.assertEqual(len(new_state.models["test_alunto", "pony"].options.get("unique_together", set())), 1)
 
+    def test_alter_unique_together_remove(self):
+        operation = migrations.AlterUniqueTogether("Pony", None)
+        self.assertEqual(operation.describe(), "Alter unique_together for Pony (0 constraint(s))")
+
     def test_alter_index_together(self):
         """
         Tests the AlterIndexTogether operation.
@@ -922,6 +926,10 @@ class OperationTests(OperationTestBase):
             operation.database_backwards("test_alinto", editor, new_state, project_state)
         self.assertIndexNotExists("test_alinto_pony", ["pink", "weight"])
 
+    def test_alter_index_together_remove(self):
+        operation = migrations.AlterIndexTogether("Pony", None)
+        self.assertEqual(operation.describe(), "Alter index_together for Pony (0 constraint(s))")
+
     def test_alter_model_options(self):
         """
         Tests the AlterModelOptions operation.