make SchemaEditor.create_model() raise DatabaseError if collection exists

Author: timgraham

django_mongodb/features.py

@@ -688,10 +688,6 @@ def django_test_expected_failures(self):
             "migrations.test_commands.MigrateTests.test_sqlmigrate_replaced_migration",
             "migrations.test_commands.MigrateTests.test_sqlmigrate_squashed_migration",
         },
-        "SchemaEditor.create_model() must raise DatabaseError rather than "
-        "pymongo.errors.CollectionInvalid: collection already exists": {
-            "migrations.test_commands.MigrateTests.test_migrate_initial_false",
-        },
     }
 
     @cached_property

django_mongodb/schema.py

@@ -1,7 +1,10 @@
 from django.db.backends.base.schema import BaseDatabaseSchemaEditor
 
+from .query import wrap_database_errors
+
 
 class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
+    @wrap_database_errors
     def create_model(self, model):
         self.connection.database.create_collection(model._meta.db_table)
         # Make implicit M2M tables.