问尝试并扩展contrib.auth.user模型并添加"relationships“管理

EN

from django.db import models
from django.contrib.auth.models import User

class SomeManager(models.Manager):
    def friends(self):
        # return friends bla bla bla


class Relationship(models.Model):
    """(Relationship description)"""
    from_user = models.ForeignKey(User, related_name='from_user')
    to_user = models.ForeignKey(User, related_name='to_user')
    has_requested_friendship = models.BooleanField(default=True)
    is_friend = models.BooleanField(default=False)

    objects = SomeManager()

relationships = models.ManyToManyField(User, through=Relationship, symmetrical=False)
relationships.contribute_to_class(User, 'relationships')