add support for column rename

Author: timgraham

django_mongodb/features.py

@@ -102,8 +102,6 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         "schema.tests.SchemaTests.test_alter_null_to_not_null",
         "schema.tests.SchemaTests.test_alter_primary_key_the_same_name",
         "schema.tests.SchemaTests.test_autofield_to_o2o",
-        # AlterField (rename)
-        "schema.tests.SchemaTests.test_rename",
         # AlterField (db_index)
         "schema.tests.SchemaTests.test_indexes",
         "schema.tests.SchemaTests.test_remove_constraints_capital_letters",

django_mongodb/schema.py

@@ -38,7 +38,11 @@ def _alter_field(
         new_db_params,
         strict=False,
     ):
-        pass
+        # Have they renamed the column?
+        if old_field.column != new_field.column:
+            self.connection.database[model._meta.db_table].update_many(
+                {}, {"$rename": {old_field.column: new_field.column}}
+            )
 
     def remove_field(self, model, field):
         # Remove implicit M2M tables.