def test_get_unknown_serializer(self): """ #15889: get_serializer('nonsense') raises a SerializerDoesNotExist """ with self.assertRaises(SerializerDoesNotExist): serializers.get_serializer("nonsense") with self.assertRaises(KeyError): serializers.get_serializer("nonsense") # SerializerDoesNotExist is instantiated with the nonexistent format with self.assertRaises(SerializerDoesNotExist) as cm: serializers.get_serializer("nonsense") self.assertEqual(cm.exception.args, ("nonsense",))
def handle(self, *app_labels, **options): from djangocg.db.models import get_app, get_apps, get_model format = options.get('format') indent = options.get('indent') using = options.get('database') excludes = options.get('exclude') show_traceback = options.get('traceback') use_natural_keys = options.get('use_natural_keys') use_base_manager = options.get('use_base_manager') excluded_apps = set() excluded_models = set() for exclude in excludes: if '.' in exclude: app_label, model_name = exclude.split('.', 1) model_obj = get_model(app_label, model_name) if not model_obj: raise CommandError('Unknown model in excludes: %s' % exclude) excluded_models.add(model_obj) else: try: app_obj = get_app(exclude) excluded_apps.add(app_obj) except ImproperlyConfigured: raise CommandError('Unknown app in excludes: %s' % exclude) if len(app_labels) == 0: app_list = SortedDict((app, None) for app in get_apps() if app not in excluded_apps) else: app_list = SortedDict() for label in app_labels: try: app_label, model_label = label.split('.') try: app = get_app(app_label) except ImproperlyConfigured: raise CommandError("Unknown application: %s" % app_label) if app in excluded_apps: continue model = get_model(app_label, model_label) if model is None: raise CommandError("Unknown model: %s.%s" % (app_label, model_label)) if app in app_list.keys(): if app_list[app] and model not in app_list[app]: app_list[app].append(model) else: app_list[app] = [model] except ValueError: # This is just an app - no model qualifier app_label = label try: app = get_app(app_label) except ImproperlyConfigured: raise CommandError("Unknown application: %s" % app_label) if app in excluded_apps: continue app_list[app] = None # Check that the serialization format exists; this is a shortcut to # avoid collating all the objects and _then_ failing. if format not in serializers.get_public_serializer_formats(): raise CommandError("Unknown serialization format: %s" % format) try: serializers.get_serializer(format) except KeyError: raise CommandError("Unknown serialization format: %s" % format) def get_objects(): # Collate the objects to be serialized. for model in sort_dependencies(app_list.items()): if model in excluded_models: continue if not model._meta.proxy and router.allow_syncdb(using, model): if use_base_manager: objects = model._base_manager else: objects = model._default_manager for obj in objects.using(using).\ order_by(model._meta.pk.name).iterator(): yield obj try: self.stdout.ending = None serializers.serialize(format, get_objects(), indent=indent, use_natural_keys=use_natural_keys, stream=self.stdout) except Exception as e: if show_traceback: raise raise CommandError("Unable to serialize database: %s" % e)