Reversing a migration that adds a table fails on SQLite with a CASCADE syntax error

piccolo/apps/migrations/auto/migration_manager.py

@@ -921,7 +921,11 @@ async def _run_add_tables(self, backwards: bool = False):
 
         if backwards:
             for _Table in reversed(sorted_table_classes):
-                await self._run_query(_Table.alter().drop_table(cascade=True))
+                await self._run_query(
+                    _Table.alter().drop_table(
+                        cascade=_Table._meta.db.engine_type != "sqlite"
+                    )
+                )
         else:
             for _Table in sorted_table_classes:
                 await self._run_query(_Table.create_table())

tests/apps/migrations/auto/test_migration_manager.py

@@ -271,6 +271,37 @@ def test_add_table(self, get_app_config: MagicMock):
                 )
         self.assertEqual(self.table_exists("musician"), False)
 
+    @engines_only("sqlite")
+    @patch.object(BaseMigrationManager, "get_app_config")
+    def test_add_table_sqlite(self, get_app_config: MagicMock):
+        """
+        Make sure a table can be added, then the migration reversed, on
+        SQLite. Reversing used to fail, because it tried to run
+        `DROP TABLE ... CASCADE`, which SQLite doesn't support.
+
+        https://github.com/piccolo-orm/piccolo/issues/1420
+
+        """
+        self.run_sync("DROP TABLE IF EXISTS musician;")
+
+        manager = MigrationManager()
+        manager.add_table(class_name="Musician", tablename="musician")
+        manager.add_column(
+            table_class_name="Musician",
+            tablename="musician",
+            column_name="name",
+            column_class_name="Varchar",
+        )
+        asyncio.run(manager.run())
+        self.assertTrue(self.table_exists("musician"))
+
+        # Reverse
+        get_app_config.return_value = AppConfig(
+            app_name="music", migrations_folder_path=""
+        )
+        asyncio.run(manager.run(backwards=True))
+        self.assertFalse(self.table_exists("musician"))
+
     @engines_only("postgres", "cockroach")
     def test_add_column(self) -> None:
         """