Django-如何检索已登录用户好友的帖子数据

Question

I am working on a Social network project!! It has models that saves User data ,Friends data and Posts data

Users -> User Info
Friends -> User friends
Media -> All Posts from users

How do i get the posts of friends of logged-in user .

class Friends(models.Model):
    """Model for saving relationship of user and friends"""
    request_id = models.ForeignKey(User,on_delete=models.CASCADE,related_name='current_user')
    friend_id = models.ForeignKey(User,on_delete=models.CASCADE,related_name='user_friend')
    created_on = models.DateTimeField(auto_now_add=True,auto_now=False)

class MediaDB(models.Model):
    """All User Feed Items"""
    username = models.ForeignKey(User,on_delete=models.CASCADE,)
    m_url = models.FileField(blank=True,null=True)
    timeStamp = models.DateTimeField(auto_now_add=True,auto_now=False)
    location = models.CharField(max_length=30)
    likes_count = models.BigIntegerField(default=0)

Answer 1

You can get all the posts for the friends of the logged-in user by following the relationships:

friends_posts = MediaDB.objects.filter(username__user_friend__request_id=request.user)

Note that some of your naming is a bit odd; the username field on MediaDB points to the user, so it should be called just user , and the fields on Friends are even stranger; there is no "request" involved, and they are not "ids", and the reverse relations don't at all explain what they are.