def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def edit_group(group_id):
    group = Group.query.filter_by(id=group_id).first_or_404()

    form = EditGroupForm(group)

    if form.validate_on_submit():
        form.populate_obj(group)
        group.save()

        if group.guest:
            Guest.invalidate_cache()

        flash(_("Group updated."), "success")
        return redirect(url_for("management.groups", group_id=group.id))

    return render_template("management/group_form.html", form=form,
                           title=_("Edit Group"))