Django auth.user具有独特的电子邮件 [英] Django auth.user with unique email

问题描述

我使用django.auth系统，我这样做：

I use the django.auth system and I've this:

class RegisterForm(UserCreationForm):
    username = forms.RegexField(label= "Username" , max_length = 30, regex = r'^[\w]+$', error_messages = {'invalid': "This value may contain only letters, numbers and _ characters."})
    email = forms.EmailField(label = "Email")
    first_name = forms.CharField(label = "First name", required = False)
    last_name = forms.CharField(label = "Last name", required = False)

    class Meta:
        model = User
        fields = ("username", "first_name", "last_name", "email", )

    def save(self, commit = True):
        user = super(RegisterForm, self).save(commit = False)
        user.first_name = self.cleaned_data["first_name"]
        user.last_name = self.cleaned_data["last_name"]
        user.email = self.cleaned_data["email"]
        if commit:
            user.save()
        return user

我想将电子邮件设置为独家，并检查此验证的表单。我该怎么做？

I want to set emails as uniques and check the form for this validation. How can I do it?

推荐答案

将此添加到您的表单中。但这不是完美的方式。竞争条件只能使用这种形式。我建议您在db级别添加唯一的约束。

add this to your form. But this isn't perfect way. race condition is available by only using this form. I recommend you to add unique constraint at db level.

def clean_email(self):
    data = self.cleaned_data['email']
    if User.objects.filter(email=data).exists():
        raise forms.ValidationError("This email already used")
    return data

SQL添加唯一约束：

SQL to add unique constraint:

ALTER TABLE auth_user ADD UNIQUE (email)

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