Django待办应用邮箱注册登录报错：core_user表不存在求助

一、修复core_user表不存在的错误 #

1. 确认自定义用户模型配置
   • 若使用自定义用户模型，必须在settings.py中指定AUTH_USER_MODEL：

     # settings.py
     AUTH_USER_MODEL = 'core.User'
     

   • 确保core应用已加入INSTALLED_APPS：

     INSTALLED_APPS = [
         # 其他内置/第三方应用
         'core',
     ]
     

2. 执行数据库迁移
   • 若先定义了自定义用户模型再初始化迁移，直接运行：

     python manage.py makemigrations core
     python manage.py migrate
     

   • 注意：如果是项目中途修改用户模型，需清空现有数据库（如删除db.sqlite3）后重新执行迁移，Django不支持中途替换默认用户模型。
3. 检查自定义用户模型定义
   确保core/models.py中的用户模型正确继承基类并配置管理器：

   # core/models.py
   from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, PermissionsMixin
   from django.db import models
   
   class UserManager(BaseUserManager):
       def create_user(self, email, password=None, **extra_fields):
           if not email:
               raise ValueError('必须提供邮箱地址')
           email = self.normalize_email(email)
           user = self.model(email=email, **extra_fields)
           user.set_password(password)
           user.save(using=self._db)
           return user
   
       def create_superuser(self, email, password=None, **extra_fields):
           extra_fields.setdefault('is_staff', True)
           extra_fields.setdefault('is_superuser', True)
           return self.create_user(email, password, **extra_fields)
   
   class User(AbstractBaseUser, PermissionsMixin):
       email = models.EmailField(unique=True)
       is_active = models.BooleanField(default=True)
       is_staff = models.BooleanField(default=False)
   
       objects = UserManager()
   
       USERNAME_FIELD = 'email'
       REQUIRED_FIELDS = []
   

二、实现邮箱密码注册登录功能 #

1. 注册视图 #

# core/views.py
from django.contrib.auth import authenticate, login
from django.shortcuts import render, redirect
from .forms import UserRegistrationForm

def register(request):
    if request.method == 'POST':
        form = UserRegistrationForm(request.POST)
        if form.is_valid():
            form.save()
            email = form.cleaned_data.get('email')
            password = form.cleaned_data.get('password1')
            user = authenticate(email=email, password=password)
            login(request, user)
            return redirect('todo_list')  # 替换为你的首页路由名称
    else:
        form = UserRegistrationForm()
    return render(request, 'core/register.html', {'form': form})

2. 注册表单 #

# core/forms.py
from django import forms
from django.contrib.auth.forms import UserCreationForm
from .models import User

class UserRegistrationForm(UserCreationForm):
    class Meta:
        model = User
        fields = ('email',)

3. 登录视图 #

# core/views.py
def user_login(request):
    if request.method == 'POST':
        email = request.POST.get('email')
        password = request.POST.get('password')
        user = authenticate(request, email=email, password=password)
        if user is not None:
            login(request, user)
            return redirect('todo_list')
        else:
            return render(request, 'core/login.html', {'error': '邮箱或密码错误'})
    return render(request, 'core/login.html')

4. 注册模板示例（register.html） #

<!-- templates/core/register.html -->
<form method="post">
    {% csrf_token %}
    {{ form.as_p }}
    <button type="submit">完成注册</button>
</form>

5. 路由配置 #

# core/urls.py
from django.urls import path
from . import views

urlpatterns = [
    path('register/', views.register, name='register'),
    path('login/', views.user_login, name='login'),
]

三、注意事项 #

• 所有需要引用用户模型的代码，统一使用get_user_model()而非直接导入：

  from django.contrib.auth import get_user_model
  User = get_user_model()
  

• 若之前运行过默认用户模型的迁移，必须清空数据库后重新执行迁移，否则会出现表结构冲突。

内容的提问来源于stack exchange，提问作者Rcacodedev