IntegrityError：唯一约束失败：users

问题描述

我是Django的初学者，这是我的第一个没有书籍或教程的项目。我从一个基于AbstractUser的Custom User类开始了我的项目。之后，我使用了第三方软件包django-allauth来处理用户注册流程，并且一切正常。用户只能注册并使用其电子邮件登录，不需要用户名。

当我在django-allauth配置中更改注册表单时，问题开始了。在此新表单中，我在用户注册时添加了一些自定义字段，但这给了我无法修复的错误。重要的一件事是，即使我不断遇到此错误，也已创建了新用户。

我读过很多关于同一问题的问题，但没有一个能帮助我解决问题。

使用新字段进行编辑

这是我的 models.py ：

class CustomUser(AbstractUser):
  username = models.CharField(max_length=100,unique=True,null=True)
  email = models.EmailField(verbose_name="Email",null=True,max_length=250)
  first_name = models.CharField(verbose_name="Nome",max_length=100,null=True)
  last_name = models.CharField(verbose_name="Sobrenome",max_length=250,null=True)

USERNAME_FIELD = 'email' 
required_FIELDS = ['first_name','last_name',]

我的 forms.py ：

class CustomUserCreationForm(UserCreationForm):

  class Meta:
        model = get_user_model()
        fields = ('email','first_name','major','university',)

class CustomUserChangeForm(UserChangeForm):

    class Meta:
        model = get_user_model()
        fields = ('first_name',)

还有我的 admin.py ：

class CustomUserAdmin(UserAdmin):
  add_form = CustomUserCreationForm
  form = CustomUserChangeForm
  model = CustomUser
  list_display = ['full_name','email',]
  #fieldsets add fields to the change form and add_fieldsets to the creation form
  fieldsets = UserAdmin.fieldsets + (
      (None,{'fields': ('major',)}),)
  add_fieldsets = (
      (None,{
          'classes': ('wide',),'fields': ('email','username','university'),}),)
ordering = ('email',)

admin.site.register(CustomUser,CustomUserAdmin)

此外，我检查了数据库，没有重复的电子邮件。

编辑

由于我使用的是django-allauth，因此我认为这段代码可能会有所帮助。 settings.py ：

#Django allauth settings
ACCOUNT_EMAIL_required = True #Email is required when signing up
ACCOUNT_AUTHENTICATION_METHOD = "email" #Users can only log in using their 
ACCOUNT_USERNAME_required = False
ACCOUNT_USER_MODEL_USERNAME_FIELD = None
ACCOUNT_logoUT_REDIRECT = 'home'
LOGIN_REDIRECT_URL = 'home'
ACCOUNT_SIGNUP_FORM_CLASS = 'users.forms.CustomUserCreationForm'

EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'

编辑新错误 新的错误消息

     Internal Server Error: /accounts/signup/
Traceback (most recent call last):
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\backends\utils.py",line 86,in _execute
    return self.cursor.execute(sql,params)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\backends\sqlite3\base.py",line 396,in execute
    return Database.Cursor.execute(self,query,params)
sqlite3.IntegrityError: UNIQUE constraint Failed: users_customuser.email

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\core\handlers\exception.py",line 34,in inner
    response = get_response(request)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\core\handlers\base.py",line 115,in _get_response
    response = self.process_exception_by_middleware(e,request)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\core\handlers\base.py",line 113,in _get_response
    response = wrapped_callback(request,*callback_args,**callback_kwargs)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\views\generic\base.py",line 71,in view
    return self.dispatch(request,*args,**kwargs)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\utils\decorators.py",line 43,in _wrapper
    return bound_method(*args,**kwargs)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\views\decorators\debug.py",line 76,in sensitive_post_parameters_wrapper
    return view(request,**kwargs)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\allauth\account\views.py",line 215,in dispatch
    return super(SignupView,self).dispatch(request,line 78,in dispatch
    response = super(RedirectAuthenticatedUserMixin,File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\allauth\account\views.py",line 191,in dispatch
    return super(CloseableSignupMixin,File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\views\generic\base.py",line 97,in dispatch
    return handler(request,line 104,in post
    response = self.form_valid(form)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\allauth\account\views.py",line 231,in form_valid
    self.user = form.save(self.request)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\allauth\account\forms.py",line 405,in save
    self.custom_signup(request,user)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\allauth\account\forms.py",line 359,in custom_signup
    custom_form.save(user)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\contrib\auth\forms.py",line 128,in save
    user.save()
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\contrib\auth\base_user.py",line 66,in save
    super().save(*args,**kwargs)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\base.py",line 745,in save
    self.save_base(using=using,force_insert=force_insert,File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\base.py",line 782,in save_base
    updated = self._save_table(
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\base.py",line 886,in _save_table
    results = self._do_insert(cls._base_manager,using,fields,returning_fields,raw)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\base.py",line 923,in _do_insert
    return manager._insert(
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\manager.py",line 82,in manager_method
    return getattr(self.get_queryset(),name)(*args,**kwargs)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\query.py",line 1204,in _insert
    return query.get_compiler(using=using).execute_sql(returning_fields)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\models\sql\compiler.py",line 1377,in execute_sql
    cursor.execute(sql,params)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\backends\utils.py",line 100,in execute
    return super().execute(sql,line 68,in execute
    return self._execute_with_wrappers(sql,params,many=False,executor=self._execute)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\backends\utils.py",line 77,in _execute_with_wrappers
    return executor(sql,many,context)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\backends\utils.py",params)
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\utils.py",line 90,in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "C:\Users\Bruno\.virtualenvs\Sophia-owJCV_9p\lib\site-packages\django\db\backends\utils.py",params)
django.db.utils.IntegrityError: UNIQUE constraint Failed: users_customuser.email
[21/Aug/2020 11:08:00] "POST /accounts/signup/ HTTP/1.1" 500 214904

Database before creating first user

Database after creating first user

解决方法

这样写：

email = models.EmailField(verbose_name="Email",null=True,unique=True,max_length=100)

好吧，经过一些研究，我设法解决了我的问题

问题出在我的CustomUserCreationForm中。由于我使用django-allauth进行身份验证，因此我应该在创建表单中添加其他字段，然后让django-allauth处理电子邮件和密码字段。因此，通过从Meta类中删除电子邮件，我可以解决用户电子邮件中发生的IntegrityError。

现在，我的CustomUserCreationForm看起来像这样：

        model = CustomUser
        fields = ('first_name','last_name','date_of_birth',)```

django django django-allauth

IntegrityError：唯一约束失败：users_customuser.email

问题描述

解决方法