关注与被关注是现在很多网站的必需实现的功能，使用关系表也很容易表达，
下面是一一个简单的例子，
定义user表并写出设置关注与察看关注者的函数
class User(models.Model):
username = models.CharField(max_length=30)
def get_follower(self):
'''
folloer 关注的人
:return:
'''
user_list = []
for followed_user in self.user.followed.all():
user_list.append(followed_user.follower)
return user_list
def get_followed(self):
'''
followed 关注我的人
:return:
'''
user_list = []
for follower_user in self.user.follower.all():
user_list.append(follower_user.followed)
return user_list
def set_follower(self,id):
'''
follow some user use id
:param id:
:return:
'''
try:
user = User.objects.get(id=id)
except Exception:
return None
# 这是关注的逻辑
friendship = FriendShip()
friendship.followed = self.user
friendship.follower = user
friendship.save()
return True
中间的联系两个user的关系表
class FriendShip(models.Model):
followed = models.ForeignKey(User,related_name='followed')
follower = models.ForeignKey(User,related_name='follower')
