from django.db import models
from django.db import models

class Person(models.Model):
    ‘‘‘人‘‘‘
    name = models.CharField(max_length=50)

class Group(models.Model):
    ‘‘‘組‘‘‘
    name = models.CharField(max_length=128)
    members = models.ManyToManyField(
        Person,
        through=‘Membership‘,
        through_fields=(‘group‘, ‘person‘),
    )

class Membership(models.Model):
    ‘‘‘
    會員
    ‘‘‘
    group = models.ForeignKey(Group, on_delete=models.CASCADE)
    person = models.ForeignKey(Person, on_delete=models.CASCADE)
    inviter = models.ForeignKey(
        Person,
        on_delete=models.CASCADE,
        related_name="membership_invites",
    )
    invite_reason = models.CharField(max_length=64)

through_fields=(‘group‘, ‘person‘),  通過後端返回的是Membership   註意

(‘group‘, ‘person‘)  第一個字段指向自己。第二字段指向別人

ORM自定義第三張表註意