如何从另一个模型自动制作模型？

Question

每当用户进行新的预订时，我希望使用预订类中的“first_name”、“last_name”和“email”字段自动创建个人资料。

models.py

from django.db import models
from django.db.models.signals import post_save

class Reservation(models.Model):
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)
    email = models.EmailField()
    address = models.CharField(max_length=50)
    check_in = models.DateField()
    check_out = models.DateField()
    num_guest = models.IntegerField()

    reason = (
    ('Birthday', 'Birthday'),
    ('Anniversary', 'Anniversary'),
    ('Get Away From Kids', 'Get Away From Kids'),
    ('Vacation', 'Vacation'),
    ('Treating Myself', 'Treating Myself'),
    ('Leave Blank', 'Leave Blank'),
    )

    opt = models.CharField(max_length=120, choices = reason)

    def __str__(self):
        return "%s %s" % (self.first_name, self.last_name)

class Profile(models.Model):

    guest = models.ForeignKey(Reservation, on_delete=models.CASCADE)

    def __str__(self):
        return "%s" % (self.guest)

def create_profile(sender, instance, created, **kwargs):
        post_save.connect(create_profile, sender=Reservation)

我试图不修改 Reservation 类，因为我需要将字段作为 ModelForm。

编码新手，感谢您的指导！

Answer 1

这就是abstract base classes 的用途，我相信。不过，不确定一致性，但您仍然可以将外键存储到 Reservation。或者，您可以在 Profile 中定义 @property 并手动检索数据（根据这个问题：Django queryset with Model method containing another queryset）。