loaddata.py 文件源码

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]

        # Check kept for backwards-compatibility; it doesn't look very useful.
        if '.' in os.path.basename(fixture_name):
            raise CommandError(
                    "Problem installing fixture '%s': %s is not a known "
                    "serialization format." % tuple(fixture_name.rsplit('.')))

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

        if os.path.sep in fixture_name:
            fixture_dirs = [os.path.dirname(fixture_name)]
            fixture_name = os.path.basename(fixture_name)
        else:
            fixture_dirs = self.fixture_dirs

        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)

        return fixture_files