seahub/forms.py

from django import forms
from django.contrib.auth.models import User
from django.utils.translation import ugettext_lazy as _

class AddUserForm(forms.Form):
    """
    Form for adding a user.
    """

    email = forms.EmailField()
    password1 = forms.CharField(widget=forms.PasswordInput())
    password2 = forms.CharField(widget=forms.PasswordInput())

    def clean_email(self):
        try:
            user = User.objects.get(email__iexact=self.cleaned_data['email'])
        except User.DoesNotExist:
            return self.cleaned_data['email']

        raise forms.ValidationError(_("A user with this email already"))

    def clean(self):
        """
        Verifiy that the values entered into the two password fields
        match. Note that an error here will end up in
        ``non_field_errors()`` because it doesn't apply to a single
        field.
        
        """
        if 'password1' in self.cleaned_data and 'password2' in self.cleaned_data:
            if self.cleaned_data['password1'] != self.cleaned_data['password2']:
                raise forms.ValidationError(_("The two password fields didn't match."))
        return self.cleaned_data