def test_register(self): "Registering a new serializer populates the full registry. Refs #14823" serializers.register_serializer('json3', 'djangocg.core.serializers.json') public_formats = serializers.get_public_serializer_formats() self.assertIn('json3', public_formats) self.assertIn('json2', public_formats) self.assertIn('xml', public_formats)
def test_unregister(self): "Unregistering a serializer doesn't cause the registry to be repopulated. Refs #14823" serializers.unregister_serializer('xml') serializers.register_serializer('json3', 'djangocg.core.serializers.json') public_formats = serializers.get_public_serializer_formats() self.assertNotIn('xml', public_formats) self.assertIn('json3', public_formats)
def test_builtin_serializers(self): "Requesting a list of serializer formats popuates the registry" all_formats = set(serializers.get_serializer_formats()) public_formats = set(serializers.get_public_serializer_formats()) self.assertIn('xml', all_formats), self.assertIn('xml', public_formats) self.assertIn('json2', all_formats) self.assertIn('json2', public_formats) self.assertIn('python', all_formats) self.assertNotIn('python', public_formats)
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)
def handle(self, *fixture_labels, **options): using = options.get('database') connection = connections[using] if not len(fixture_labels): raise CommandError( "No database fixture specified. Please provide the path of at " "least one fixture in the command line." ) verbosity = int(options.get('verbosity')) show_traceback = options.get('traceback') # commit is a stealth option - it isn't really useful as # a command line option, but it can be useful when invoking # loaddata from within another script. # If commit=True, loaddata will use its own transaction; # if commit=False, the data load SQL will become part of # the transaction in place when loaddata was invoked. commit = options.get('commit', True) # Keep a count of the installed objects and fixtures fixture_count = 0 loaded_object_count = 0 fixture_object_count = 0 models = set() humanize = lambda dirname: "'%s'" % dirname if dirname else 'absolute path' # Get a cursor (even though we don't need one yet). This has # the side effect of initializing the test database (if # it isn't already initialized). cursor = connection.cursor() # Start transaction management. All fixtures are installed in a # single transaction to ensure that all references are resolved. if commit: transaction.commit_unless_managed(using=using) transaction.enter_transaction_management(using=using) transaction.managed(True, using=using) class SingleZipReader(zipfile.ZipFile): def __init__(self, *args, **kwargs): zipfile.ZipFile.__init__(self, *args, **kwargs) if settings.DEBUG: assert len(self.namelist()) == 1, "Zip-compressed fixtures must contain only one file." def read(self): return zipfile.ZipFile.read(self, self.namelist()[0]) compression_types = { None: open, 'gz': gzip.GzipFile, 'zip': SingleZipReader } if has_bz2: compression_types['bz2'] = bz2.BZ2File app_module_paths = [] for app in get_apps(): if hasattr(app, '__path__'): # It's a 'models/' subpackage for path in app.__path__: app_module_paths.append(path) else: # It's a models.py module app_module_paths.append(app.__file__) app_fixtures = [os.path.join(os.path.dirname(path), 'fixtures') for path in app_module_paths] try: with connection.constraint_checks_disabled(): for fixture_label in fixture_labels: parts = fixture_label.split('.') if len(parts) > 1 and parts[-1] in compression_types: compression_formats = [parts[-1]] parts = parts[:-1] else: compression_formats = compression_types.keys() if len(parts) == 1: fixture_name = parts[0] formats = serializers.get_public_serializer_formats() else: fixture_name, format = '.'.join(parts[:-1]), parts[-1] if format in serializers.get_public_serializer_formats(): formats = [format] else: formats = [] if formats: if verbosity >= 2: self.stdout.write("Loading '%s' fixtures..." % fixture_name) else: raise CommandError( "Problem installing fixture '%s': %s is not a known serialization format." % (fixture_name, format)) if os.path.isabs(fixture_name): fixture_dirs = [fixture_name] else: fixture_dirs = app_fixtures + list(settings.FIXTURE_DIRS) + [''] for fixture_dir in fixture_dirs: if verbosity >= 2: self.stdout.write("Checking %s for fixtures..." % humanize(fixture_dir)) label_found = False for combo in product([using, None], formats, compression_formats): database, format, compression_format = combo file_name = '.'.join( p for p in [ fixture_name, database, format, compression_format ] if p ) if verbosity >= 3: self.stdout.write("Trying %s for %s fixture '%s'..." % \ (humanize(fixture_dir), file_name, fixture_name)) full_path = os.path.join(fixture_dir, file_name) open_method = compression_types[compression_format] try: fixture = open_method(full_path, 'r') except IOError: if verbosity >= 2: self.stdout.write("No %s fixture '%s' in %s." % \ (format, fixture_name, humanize(fixture_dir))) else: try: if label_found: raise CommandError("Multiple fixtures named '%s' in %s. Aborting." % (fixture_name, humanize(fixture_dir))) fixture_count += 1 objects_in_fixture = 0 loaded_objects_in_fixture = 0 if verbosity >= 2: self.stdout.write("Installing %s fixture '%s' from %s." % \ (format, fixture_name, humanize(fixture_dir))) objects = serializers.deserialize(format, fixture, using=using) for obj in objects: objects_in_fixture += 1 if router.allow_syncdb(using, obj.object.__class__): loaded_objects_in_fixture += 1 models.add(obj.object.__class__) try: obj.save(using=using) except (DatabaseError, IntegrityError) as e: e.args = ("Could not load %(app_label)s.%(object_name)s(pk=%(pk)s): %(error_msg)s" % { 'app_label': obj.object._meta.app_label, 'object_name': obj.object._meta.object_name, 'pk': obj.object.pk, 'error_msg': force_text(e) },) raise loaded_object_count += loaded_objects_in_fixture fixture_object_count += objects_in_fixture label_found = True except Exception as e: if not isinstance(e, CommandError): e.args = ("Problem installing fixture '%s': %s" % (full_path, e),) raise finally: fixture.close() # If the fixture we loaded contains 0 objects, assume that an # error was encountered during fixture loading. if objects_in_fixture == 0: raise CommandError( "No fixture data found for '%s'. (File format may be invalid.)" % (fixture_name)) # Since we disabled constraint checks, we must manually check for # any invalid keys that might have been added table_names = [model._meta.db_table for model in models] try: connection.check_constraints(table_names=table_names) except Exception as e: e.args = ("Problem installing fixtures: %s" % e,) raise except (SystemExit, KeyboardInterrupt): raise except Exception as e: if commit: transaction.rollback(using=using) transaction.leave_transaction_management(using=using) raise # If we found even one object in a fixture, we need to reset the # database sequences. if loaded_object_count > 0: sequence_sql = connection.ops.sequence_reset_sql(no_style(), models) if sequence_sql: if verbosity >= 2: self.stdout.write("Resetting sequences\n") for line in sequence_sql: cursor.execute(line) if commit: transaction.commit(using=using) transaction.leave_transaction_management(using=using) if verbosity >= 1: if fixture_object_count == loaded_object_count: self.stdout.write("Installed %d object(s) from %d fixture(s)" % ( loaded_object_count, fixture_count)) else: self.stdout.write("Installed %d object(s) (of %d) from %d fixture(s)" % ( loaded_object_count, fixture_object_count, fixture_count)) # Close the DB connection. This is required as a workaround for an # edge case in MySQL: if the same connection is used to # create tables, load data, and query, the query can return # incorrect results. See Django #7572, MySQL #37735. if commit: connection.close()