如何从Django中的UserCreationForm中删除用户名字段

Question

I want my user registration page to display email and password field, and no username. I have created this Register Form:

class RegisterForm(UserCreationForm):
    email = forms.EmailField(label = "Email")
    #fullname = forms.CharField(label = "First name")

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

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

But the username still appears. Do I need to override something else?

Answer 1

You can pop out the username from the form's fields like so:

class RegisterForm(UserCreationForm):

    def __init__(self, *args, **kwargs): 
        super(RegisterForm, self).__init__(*args, **kwargs) 
        # remove username
        self.fields.pop('username')
    ...

But then you would need to fill-in some random username before saving like so:

from random import choice
from string import letters
...

class RegisterForm(UserCreationForm):
...
    def save(self):
        random = ''.join([choice(letters) for i in xrange(30)])
        self.instance.username = random
        return super(RegisterForm, self).save()

There are other considerations to take when you hack it this way, like making sure your LoginForm would pull the username later on when it is needed:

class LoginForm(AuthenticationForm):

    email = forms.EmailField(label=_("E-mail"), max_length=75)

    def __init__(self, *args, **kwargs): 
        super(LoginForm, self).__init__(*args, **kwargs) 
        self.fields['email'].required = True 
        # remove username
        self.fields.pop('username')

    def clean(self):
        user = User.objects.get(email=self.cleaned_data.get('email'))
        self.cleaned_data['username'] = user.username
        return super(LoginForm, self).clean()

Answer 2

Found it. This is exactly what I wanted to do: http://www.micahcarrick.com/django-email-authentication.html

Answer 3

Add that field to the Meta class's exclude:

class RegisterForm(UserCreationForm):
    email = forms.EmailField(label = "Email")
    #fullname = forms.CharField(label = "First name")

    class Meta:
        model = User
        exclude = ['username',]