ndb.Modelでプロパテぃが全てSerializableな時のmemcache。

gistfile1.py

    @classmethod
    def get_cached_univs_info(cls):
        """
            returns cached universities infomation.
        
            @return: dict universities. all ["univ_name"]["key"] are defined but value can be None.
            @rtype: dict
        """
        univs_info = memcache.get("univs_info") # @UndefinedVariable
        if univs_info is None:
            univs = cls.query().fetch()
            raw_univs_info = {
                univ.name:{
                    "name":univ.name,
                    "repo_url":univ.repo_url,
                    "other_research":univ.other_research,
                    "how_to_access":univ.how_to_access,
                    "group":univ.group,
                    "comment":univ.comment,
                    "keyword":univ.keyword,
                    "homepage_url":univ.homepage_url,
                    "country":univ.country,
                    "prefecture":univ.prefecture,
                    "address":univ.address,
                    "fields_of_research":univ.fields_of_research,
                    "deviation":univ.deviation,
                }
            for univ in univs} #: :type univ: models.University
            univs_info = json.dumps(raw_univs_info)
            memcache.add("univs_info",univs_info) # @UndefinedVariable
        return json.loads(univs_info)

    @classmethod
    def refresh_cached_univs_info(cls):
        memcache.delete("univs_info") #@UndefinedVariable

    def _post_put_hook(self, future):
        self.refresh_cached_univs_info()

    @classmethod
    def _post_delete_hook(cls, key, future):
        cls.refresh_cached_univs_info()
#univs_infoをhook中に更新すればもっと効率がよくなる。