Class LocalePrefixPattern

django/urls/resolvers.py:388–419

class LocalePrefixPattern:
    def __init__(self, prefix_default_language=True):
        self.prefix_default_language = prefix_default_language
        self.converters = {}

    @property
    def regex(self):
        # This is only used by reverse() and cached in _reverse_dict.
        return re.compile(re.escape(self.language_prefix))

    @property
    def language_prefix(self):
        language_code = get_language() or settings.LANGUAGE_CODE
        if language_code == settings.LANGUAGE_CODE and not self.prefix_default_language:
            return ""
        else:
            return "%s/" % language_code

    def match(self, path):
        language_prefix = self.language_prefix
        if path.startswith(language_prefix):
            return path.removeprefix(language_prefix), (), {}
        return None

    def check(self):
        return []

    def describe(self):
        return "'{}'".format(self)

    def __str__(self):
        return self.language_prefix


class URLPattern: