langstrings.py 文件源码

def _do_create_from_json(
            cls, json, parse_def, context,
            duplicate_handling=None, object_importer=None):
        # Special case for JSON-LD
        added = False
        ls = cls()
        def guess_lang(value):
            from .discussion import Discussion
            discussion = context.get_instance_of_class(Discussion)
            if discussion:
                tr_service = discussion.translation_service()
                lang, _ = tr_service.identify(value)
            return LocaleLabel.UNDEFINED

        if isinstance(json, list):
            for entry_record in json:
                value = entry_record['@value']
                if value:
                    added = True
                    lang = entry_record.get('@language', None) or guess_lang(value)
                    ls.add_value(value, lang)
        elif isinstance(json, dict):
            if '@id' in json or '@type' in json:
                return super(LangString, cls)._do_create_from_json(
                    json, parse_def, context,
                    duplicate_handling, object_importer)
            elif '@value' in json:
                value = json['@value']
                if value:
                    added = True
                    lang = json.get('@language', None) or guess_lang(value)
                    ls.add_value(value, lang)
            else:
                for lang, value in json.items():
                    if value:
                        added = True
                        ls.add_value(value, lang)
        elif isinstance(json, string_types):
            if json:
                added = True
                lang = guess_lang(json)
                ls.add_value(json, lang)
        else:
            raise ValueError("Not a valid langstring: " + json)
        i_context = ls.get_instance_context(context)
        if added:
            cls.default_db.add(ls)
        else:
            i_context._instance = None
        return i_context