Django with Tastypie：如何在Profile中存儲關注者，followers_count？

我：Django with Tastypie：如何在Profile中存儲關注者，followers_count？

class Profile(models.Model): 
    user = models.OneToOneField(User) 
    birthday = models.DateField(null=True) 
    gender = models.CharField(max_length=140) 
    profile_picture = models.URLField() 

class Follow(models.Model): 
    follower = models.ForeignKey(User, related_name="who_follows") 
    followed = models.ForeignKey(User, related_name="who_is_followed") 
    follow_time = DateTimeField(auto_now=True)

那麼應該怎麼ProfileResource，以便我能得到FOLLOWERS_COUNT？或者我可以POST那個用戶有一個新的追隨者？

我ProfileResource是：

class ProfileResource(ModelResource): 
    followers_count = Follow.objects.filter(followed=) 
    class Meta: 
     queryset = User.objects.all() 
     resource_name = 'profile' 
     filtering = { 
      'username': ALL, 
     }

是它的最好方法是什麼？或者我應該使用它：

class Profile(models.Model): 
    user = models.OneToOneField(User) 
    birthday = models.DateField(null=True) 
    gender = models.CharField(max_length=140) 
    profile_picture = models.URLField() 
    followers = ToManyField('self') 
    following = ToManyField('self')

來源

2012-08-01 Burak

您應該能夠通過屬性獲得關注者的數量。嘗試是這樣的：

class Profile(models.Model): 
    ... 
    def followers_count(self): 
     return self.user.who_is_followed.all().count() 

class ProfileResource(ModelResource): 
    followers_count = fields.CharField(attribute='followers_count') 
    ...

來源

2012-08-01 07:47:52 JamesO

謝謝。如果我需要獲取用戶的關注者列表，該怎麼辦？ – Burak 2012-08-01 07:52:35

如果追隨者的列表是單獨的資源，它不會更清潔嗎？ – 2012-08-01 08:06:18

如果你願意，你就需要相關的資源對象的實際列表 - 見http://django-tastypie.readthedocs.org/en/latest/resources.html#reverse-relationships – JamesO 2012-08-01 08:07:17

，你應該可以註解的查詢集的追隨者的數量，這樣就可以在一個數據庫中調用做到這一點：

queryset = User.objects.annotate(number_of_followers=Count('follow'))

來源

2012-08-01 08:10:17

Django with Tastypie：如何在Profile中存儲關注者，followers_count？

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