Question

我有两个模特医生和病人有多对多的关系。 Doctor和Patient都是我系统的用户，所以我想使用一对一的关系将它与User模块联系起来。医生模型与多对多医院有另一种关系。

以下是我的代码：

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


class Doctor(models.Model):
    photo = models.ImageField(upload_to='/uploads/photos', default='/uploads/photos/doctor_default_photo.gif')
    degree = models.CharField(max_length=200)
    speciality = models.CharField(max_length=200)
    educational_institute = models.CharField(max_length=200)
    experience = models.IntegerField(null=True)
    user = models.OneToOneField(User)


class Patient(models.Model):
    user = models.OneToOneField(User)
    disease = models.CharField(max_length=100, null=True)
    dob = models.DateField('date of birth')
    doctors = models.ManyToManyField(Doctor, through='Appointment')

    def patient_age(self):
        today = date.today()
        year, month, day = map(int, self.dob.split('-'))
        return today.year - year - ((today.month, today.day) < (month, day))


class Appointment(models.Model):
    doctor = models.ForeignKey(Doctor, on_delete=models.CASCADE)
    patient = models.ForeignKey(Patient, on_delete=models.CASCADE)
    date = models.DateField()
    time = models.TimeField()

但是，当我运行migrate命令时，我得到以下错误。

psycopg2.IntegrityError：column＆＃34; user_id＆＃34;包含空值

Django用户模型和多个模型一对一的关系问题

0 个答案: