[Django UserCreationForm在电子邮件已经存在时引发验证错误

Posted 2021-04-28

[嗨，我是Django的新手。我有一个从UserCreationForm继承的UserRegisterForm。一切正常

class UserRegisterForm(UserCreationForm):
    email = forms.EmailField(required=True)

    class Meta:
        model = User
        fields = ["username", "email", "password1", "password2"]

现在，如果数据库中已存在电子邮件，则我想在电子邮件输入框附近显示一个标志“电子邮件已存在”。我已经尝试过：

class UserRegisterForm(UserCreationForm):
    email = forms.EmailField(required=True)

    class Meta:
        model = User
        fields = ["username", "email", "password1", "password2"]

    def clean_email(self):
        username = self.cleaned_data.get("username")
        if User.objects.filter(username=username).exists():
            raise forms.ValidationError("Username is not unique")
        return username

    def clean_username(self):
        email = self.cleaned_data.get("email")
        if User.objects.filter(email=email).exists():
            raise forms.ValidationError("Email is not unique")
        return email

没有用。如果有人可以帮助我，我将非常高兴。

答案

切换两个方法名称：

def clean_username(self):
    username = self.cleaned_data.get("username")
    if User.objects.filter(username=username).exists():
        raise forms.ValidationError("Username is not unique")
    return username

def clean_email(self):
    email = self.cleaned_data.get("email")
    if User.objects.filter(email=email).exists():
        raise forms.ValidationError("Email is not unique")
    return email