forms.py 文件源码

def clean_invitees(self):
        self.invitee_users = []
        data = self.cleaned_data['invitees']
        invitees = [s.strip() for s in data.split(',')]
        for invitee in invitees:
            User = get_user_model()
            try:
                invitee_user = User.objects.get(username=invitee)
                self.invitee_users.append(invitee_user)
            except User.DoesNotExist:
                raise forms.ValidationError(_('There is no user "%s."')
                                            % invitee)

            has_invitation = bool(GroupInvitation.objects.filter(
                    group=self.group, invitee=invitee_user))
            if has_invitation:
                raise forms.ValidationError(
                    _('"%s" already has an invitation.') % invitee)

            already_member = \
                invitee_user.groups.filter(name=self.group.name).exists()
            if already_member:
                raise forms.ValidationError(
                    _('"%s" is already a member of this group.')
                    % invitee)