Question

我正在尝试将两个字段添加到Django的用户模型中。迁移和模型是：

from django.contrib.auth.models import AbstractUser

class User(AbstractUser):
    is_prostudent = models.BooleanField( default=False )
    is_teacher = models.BooleanField( default=False)

我的迁移看起来像这样：

# -*- coding: utf-8 -*-
# Generated by Django 1.11.5 on 2018-02-11 11:07
from __future__ import unicode_literals

import django.contrib.auth.models
import django.contrib.auth.validators
from django.db import migrations, models
import django.utils.timezone


class Migration(migrations.Migration):

    dependencies = [
        ('auth', '0008_alter_user_username_max_length'),
        ('students', '0005_auto_20180118_1508'),
    ]

    operations = [
        migrations.CreateModel(
            name='User',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('password', models.CharField(max_length=128, verbose_name='password')),
                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
                ('first_name', models.CharField(blank=True, max_length=30, verbose_name='first name')),
                ('last_name', models.CharField(blank=True, max_length=30, verbose_name='last name')),
                ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')),
                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
                ('is_prostudent', models.BooleanField(default=False)),
                ('is_teacher', models.BooleanField(default=False)),
                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')),
                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')),
            ],
            options={
                'verbose_name': 'user',
                'verbose_name_plural': 'users',
                'abstract': False,
            },
            managers=[
                ('objects', django.contrib.auth.models.UserManager()),
            ],
        ),
    ]

我添加了

    AUTH_USER_MODEL = 'students.User'

在我的settings.py中。

但是当我尝试迁移时，它向我显示了延迟引用的错误。领域MODEL.User被宣布为懒惰引用学生：用户，但app'学生'不提供用户模型。

这件事正在发生，因为我在项目中间这样做。现在有办法吗？我还有哪些选择。

Answer 1

我解决了django的这个主要问题。 Django建议在第一次迁移时更新用户模型。所以在项目中期很难对它进行研究。但是有一种方法可以解决这个问题。

首先清除包含app的用户模型中的所有迁移。在此之后完全删除您的数据库。您可以在灯具的帮助下保存数据库数据。 Fixtures以JSON格式保存您的数据。之后使用抽象自定义基本用户。有一个快乐的迁移。

抽象用户django迁移错误

1 个答案: