Synnefo

class AddGroupMembersForm(forms.Form):

    q = forms.CharField(max_length=800, widget=forms.Textarea, label=_('Search users'),

                        help_text=_('Add comma separated user emails'),

                        required=True)

    def clean(self):

        q = self.cleaned_data.get('q') or ''

        users = q.split(',')

        users = list(u.strip() for u in users if u)

        db_entries = AstakosUser.objects.filter(email__in=users)

        unknown = list(set(users) - set(u.email for u in db_entries))

        if unknown:

            raise forms.ValidationError(

                _('Unknown users: %s' % unknown))

        self.valid_users = db_entries

        return self.cleaned_data

    def get_valid_users(self):

        """Should be called after form cleaning"""

        try:

            return self.valid_users

        except:

            return ()