make SchemaEditor.create_model() raise DatabaseError if collection exists

.github/workflows/test-python.yml

@@ -100,7 +100,7 @@ jobs:
           many_to_many
           many_to_one
           many_to_one_null
-          migrations.test_operations
+          migrations
           model_fields
           model_forms
           mutually_referential

README.md

@@ -149,6 +149,9 @@ from the new application's `apps.py` file.
   - You can study the skipped tests in `DatabaseFeatures.django_test_skips` for
     more details on known issues.
 
+- Due to the lack of ability to introspect MongoDB collection schema,
+  `migrate --fake-initial` isn't supported.
+
 ## Troubleshooting
 
 TODO

django_mongodb/features.py

@@ -533,6 +533,8 @@ def django_test_expected_failures(self):
             "expressions.tests.BasicExpressionsTests.test_annotate_values_filter",
             "expressions.tests.BasicExpressionsTests.test_filtering_on_rawsql_that_is_boolean",
             "expressions.tests.BasicExpressionsTests.test_order_by_multiline_sql",
+            "migrations.test_commands.MigrateTests.test_migrate_plan",
+            "migrations.test_multidb.MultiDBOperationTests.test_run_sql_migrate_foo_router_with_hints",
             "migrations.test_operations.OperationTests.test_run_sql",
             "migrations.test_operations.OperationTests.test_run_sql_params",
             "migrations.test_operations.OperationTests.test_separate_database_and_state",
@@ -667,8 +669,25 @@ def django_test_expected_failures(self):
         },
         "transaction.atomic() is not supported.": {
             "backends.base.test_base.DatabaseWrapperLoggingTests",
+            "migrations.test_executor.ExecutorTests.test_atomic_operation_in_non_atomic_migration",
             "migrations.test_operations.OperationTests.test_run_python_atomic",
         },
+        "migrate --fake-initial is not supported.": {
+            "migrations.test_commands.MigrateTests.test_migrate_fake_initial",
+            "migrations.test_commands.MigrateTests.test_migrate_fake_split_initial",
+            "migrations.test_executor.ExecutorTests.test_soft_apply",
+        },
+        "SchemaEditor doesn't log or collect queries.": {
+            # https://github.com/mongodb-labs/django-mongodb/issues/141
+            "migrations.test_commands.MigrateTests.test_migrate_syncdb_app_label",
+            "migrations.test_commands.MigrateTests.test_migrate_syncdb_deferred_sql_executed_with_schemaeditor",
+            "migrations.test_commands.MigrateTests.test_sqlmigrate_backwards",
+            "migrations.test_commands.MigrateTests.test_sqlmigrate_for_non_atomic_migration",
+            "migrations.test_commands.MigrateTests.test_sqlmigrate_for_non_transactional_databases",
+            "migrations.test_commands.MigrateTests.test_sqlmigrate_forwards",
+            "migrations.test_commands.MigrateTests.test_sqlmigrate_replaced_migration",
+            "migrations.test_commands.MigrateTests.test_sqlmigrate_squashed_migration",
+        },
     }
 
     @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.