新版本的django-model-utils沒有PassThroughManager

Question

我使用Django 1.9.9，該如何代替PassThroughManager編輯模型？

from model_utils.managers import PassThroughManager

class TopicQuerySet(QuerySet):

    def get_topic_today(self):
        return self.filter(created_at__day=datetime.date.today()).order_by('title')

    def get_topic_popular(self):
        return self.annotate(entry_count=Count('entry')).order_by('-entry_count')


class Topic(TimeStampModel):

    objects = PassThroughManager.for_queryset_class(TopicQuerySet)()

我應該嘗試使用GeoManager嗎？

Answer 1

較新版本的Django（我認為是1.9+）具有一些內置的（ model_utils ） PassThroughManager之類的功能。 像這樣重寫，您應該得到相同的概念：

from django.db.models import Manager
from django.db.models.query import QuerySet

class TopicManager(Manager):
    pass

class TopicQuerySet(QuerySet):

    def get_topic_today(self):
        return self.filter(created_at__day=datetime.date.today()).order_by('title')

    def get_topic_popular(self):
        return self.annotate(entry_count=Count('entry')).order_by('-entry_count')

class Topic(TimeStampModel):
    objects = TopicManager.from_queryset(TopicQuerySet)()