Python django.core.serializers.get_public_serializer_formats() Examples

def test_builtin_serializers(self):
        """
        'geojson' should be listed in available serializers.
        """
        all_formats = set(serializers.get_serializer_formats())
        public_formats = set(serializers.get_public_serializer_formats())

        self.assertIn('geojson', all_formats),
        self.assertIn('geojson', public_formats) 

def test_register(self):
        "Registering a new serializer populates the full registry. Refs #14823"
        serializers.register_serializer('json3', 'django.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', 'django.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 test_builtin_serializers(self):
        """
        'geojson' should be listed in available serializers.
        """
        all_formats = set(serializers.get_serializer_formats())
        public_formats = set(serializers.get_public_serializer_formats())

        self.assertIn('geojson', all_formats),
        self.assertIn('geojson', public_formats) 

def __init__(self, stdout=None, stderr=None, no_color=False, *, app_label):
        super().__init__(stdout, stderr, no_color)
        self.compression_formats = {
            None: (open, 'rb'),
        }
        self.serialization_formats = serializers.get_public_serializer_formats()
        self.using = None
        self.verbosity = 0
        self.app_label = app_label 

def loaddata(self, fixture_labels):
        connection = connections[self.using]

        # Keep a count of the installed objects and fixtures
        self.fixture_count = 0
        self.loaded_object_count = 0
        self.fixture_object_count = 0
        self.models = set()

        self.serialization_formats = serializers.get_public_serializer_formats()
        # Forcing binary mode may be revisited after dropping Python 2 support (see #22399)
        self.compression_formats = {
            None: (open, 'rb'),
            'gz': (gzip.GzipFile, 'rb'),
            'zip': (SingleZipReader, 'r'),
        }
        if has_bz2:
            self.compression_formats['bz2'] = (bz2.BZ2File, 'r')

        with connection.constraint_checks_disabled():
            for fixture_label in fixture_labels:
                self.load_label(fixture_label)

        # 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 self.models]
        try:
            connection.check_constraints(table_names=table_names)
        except Exception as e:
            e.args = ("Problem installing fixtures: %s" % e,)
            raise

        # If we found even one object in a fixture, we need to reset the
        # database sequences.
        if self.loaded_object_count > 0:
            sequence_sql = connection.ops.sequence_reset_sql(no_style(), self.models)
            if sequence_sql:
                if self.verbosity >= 2:
                    self.stdout.write("Resetting sequences\n")
                with connection.cursor() as cursor:
                    for line in sequence_sql:
                        cursor.execute(line)

        if self.verbosity >= 1:
            if self.fixture_count == 0 and self.hide_empty:
                pass
            elif self.fixture_object_count == self.loaded_object_count:
                self.stdout.write("Installed %d object(s) from %d fixture(s)" %
                    (self.loaded_object_count, self.fixture_count))
            else:
                self.stdout.write("Installed %d object(s) (of %d) from %d fixture(s)" %
                    (self.loaded_object_count, self.fixture_object_count, self.fixture_count)) 

def find_fixtures(self, fixture_label):
        """
        Finds fixture files for a given label.
        """
        fixture_name, ser_fmt, cmp_fmt = self.parse_name(fixture_label)
        databases = [self.using, None]
        cmp_fmts = list(self.compression_formats.keys()) if cmp_fmt is None else [cmp_fmt]
        ser_fmts = serializers.get_public_serializer_formats() if ser_fmt is None else [ser_fmt]

        if self.verbosity >= 2:
            self.stdout.write("Loading '%s' fixtures..." % fixture_name)

        if os.path.isabs(fixture_name):
            fixture_dirs = [os.path.dirname(fixture_name)]
            fixture_name = os.path.basename(fixture_name)
        else:
            fixture_dirs = self.fixture_dirs
            if os.path.sep in os.path.normpath(fixture_name):
                fixture_dirs = [os.path.join(dir_, os.path.dirname(fixture_name))
                                for dir_ in fixture_dirs]
                fixture_name = os.path.basename(fixture_name)

        suffixes = ('.'.join(ext for ext in combo if ext)
                for combo in product(databases, ser_fmts, cmp_fmts))
        targets = set('.'.join((fixture_name, suffix)) for suffix in suffixes)

        fixture_files = []
        for fixture_dir in fixture_dirs:
            if self.verbosity >= 2:
                self.stdout.write("Checking %s for fixtures..." % humanize(fixture_dir))
            fixture_files_in_dir = []
            for candidate in glob.iglob(os.path.join(fixture_dir, fixture_name + '*')):
                if os.path.basename(candidate) in targets:
                    # Save the fixture_dir and fixture_name for future error messages.
                    fixture_files_in_dir.append((candidate, fixture_dir, fixture_name))

            if self.verbosity >= 2 and not fixture_files_in_dir:
                self.stdout.write("No fixture '%s' in %s." %
                                  (fixture_name, humanize(fixture_dir)))

            # Check kept for backwards-compatibility; it isn't clear why
            # duplicates are only allowed in different directories.
            if len(fixture_files_in_dir) > 1:
                raise CommandError(
                    "Multiple fixtures named '%s' in %s. Aborting." %
                    (fixture_name, humanize(fixture_dir)))
            fixture_files.extend(fixture_files_in_dir)

        if fixture_name != 'initial_data' and not fixture_files:
            # Warning kept for backwards-compatibility; why not an exception?
            warnings.warn("No fixture named '%s' found." % fixture_name)
        elif fixture_name == 'initial_data' and fixture_files:
            warnings.warn(
                'initial_data fixtures are deprecated. Use data migrations instead.',
                RemovedInDjango19Warning
            )

        return fixture_files