https://docs.djangoproject.com/zh-hans/2.0/ref/utils/#module-django.utils.functional Say: The cached result will persist as long as the instance does, so if the instance is passed around and the function subsequently invoked, the cached result will be returned.
https://docs.djangoproject.com/zh-hans/2.0/topics/cache/ Say: You can cache any Python object that can be pickled safely: strings, dictionaries, lists of model objects, and so forth. Then I use cache API to cache the model instance, "cached result" of the instance should be cached together. - What is the problem? 赖信桃 <[email protected]> 于2018年6月28日周四 上午11:44写道： > Django's cached framework and @cached_property are two different things, > though both has "cached" it doesn't mean that they share memory.... > > https://docs.djangoproject.com/zh-hans/2.0/topics/cache/ > > https://docs.djangoproject.com/zh-hans/2.0/ref/utils/#module-django.utils.functional > > Read the docs. > > 林挺滨 <[email protected]>于2018年6月28日周四 上午10:31写道： > >> class Log(models.Model): >> type = models.CharField(max_length=200, unique=True) >> column = SortedManyToManyField(Column, blank=True) >> min_column_cnt = models.IntegerField(blank=True, default=0, help_text='0 >> equal NULL') >> >> @cached_property >> def column_list_name(self): >> return [col.name for col in self.column.all()] >> >> @cached_property >> def column_len(self): >> return len(self.column.all()) >> >> @cached_property >> def get_all_column_checker(self): >> column_ids = [c.id for c in self.column.all()] >> return >> ColumnChecker.objects.select_related('column').filter(column_id__in=column_ids) >> >> >> def get_log_attr(log_type): >> global log_attr_dict, log_attr_last_update_ts >> if (datetime.now() - log_attr_last_update_ts).total_seconds() < >> update_log_attr_interval and \ >> log_type in log_attr_dict: >> return log_attr_dict[log_type] >> log_attr_dict[log_type] = >> Log.objects.prefetch_related('column').get(type=log_type) >> log_attr_last_update_ts = datetime.now() >> return log_attr_dict[log_type] >> >> >> Now I use module global var "log_attr_dict" to cache the Log instance, >> @cached_property of the instance is work. >> >> def get_log_attr(log_type): >> log_attr = cache.get(log_type) >> if not log_attr: >> log_attr = Log.objects.prefetch_related('column').get(type=log_type) >> cache.set(log_type, log_attr, update_log_attr_interval) >> return log_attr >> >> >> But if I use cache api to cache the Log instance, @cache_property of the >> instance isn't work. (I use the local memory cache.) >> >> 赖信桃 <[email protected]> 于2018年6月27日周三 下午9:07写道： >> >>> Show me your code snippet. >>> >>> 林挺滨 <[email protected]>于2018年6月27日周三 下午8:44写道： >>> >>>> When I use cache framework api to cache a model instance, @cached_property >>>> of the instance doesn't work. Why? >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Django users" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at https://groups.google.com/group/django-users. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/django-users/5b27fa47-c712-460f-a421-1eb1d41c764e%40googlegroups.com >>>> <https://groups.google.com/d/msgid/django-users/5b27fa47-c712-460f-a421-1eb1d41c764e%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Django users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at https://groups.google.com/group/django-users. >>> >> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/django-users/CAMv51WQMrueCfWoBV3a0Djr7QhL3mqXcg_Ak5yNt75%3DP2Vy4WA%40mail.gmail.com >>> <https://groups.google.com/d/msgid/django-users/CAMv51WQMrueCfWoBV3a0Djr7QhL3mqXcg_Ak5yNt75%3DP2Vy4WA%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >> >> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> -- >> 祝您 身体健康 >> 工作愉快！ >> >> 林挺滨 >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Django users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/django-users. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-users/CAGdZMg8v2mp%3DOiO3coBFypGZ5O%2B_FLC_5cfnK94CRXax0OHRYw%40mail.gmail.com >> <https://groups.google.com/d/msgid/django-users/CAGdZMg8v2mp%3DOiO3coBFypGZ5O%2B_FLC_5cfnK94CRXax0OHRYw%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/CAMv51WTfACztXVaoCv6GgdJBEBh8KKhdfZXHQRYw4d%2BBC_2rOQ%40mail.gmail.com > <https://groups.google.com/d/msgid/django-users/CAMv51WTfACztXVaoCv6GgdJBEBh8KKhdfZXHQRYw4d%2BBC_2rOQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 祝您 身体健康 工作愉快！ 林挺滨 -- You received this message because you are subscribed to the Google Groups "Django users" group. 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