def edit_permissions_revoke(self, repo_name):

        try:

            obj_type = request.POST.get('obj_type')

            obj_id = None

            if obj_type == 'user':

                obj_id = safe_int(request.POST.get('user_id'))

            elif obj_type == 'user_group':

                obj_id = safe_int(request.POST.get('user_group_id'))

            if obj_type == 'user':

                RepoModel().revoke_user_permission(repo=repo_name, user=obj_id)

            elif obj_type == 'user_group':

                RepoModel().revoke_user_group_permission(

                    repo=repo_name, group_name=obj_id

                )

            # TODO: implement this

            #action_logger(request.authuser, 'admin_revoked_repo_permissions',

            #              repo_name, request.ip_addr)

            Session().commit()

        except Exception:

            log.error(traceback.format_exc())

            h.flash(_('An error occurred during revoking of permission'),

                    category='error')

            raise HTTPInternalServerError()

    @HasRepoPermissionLevelDecorator('admin')

    def edit_fields(self, repo_name):

        c.repo_info = self._load_repo()

        c.repo_fields = RepositoryField.query() \

            .filter(RepositoryField.repository == c.repo_info).all()

        c.active = 'fields'

        if request.POST:

            raise HTTPFound(location=url('repo_edit_fields'))

        return render('admin/repos/repo_edit.html')

    @HasRepoPermissionLevelDecorator('admin')

    def create_repo_field(self, repo_name):

        try:

            form_result = RepoFieldForm()().to_python(dict(request.POST))

            new_field = RepositoryField()

            new_field.repository = Repository.get_by_repo_name(repo_name)

            new_field.field_key = form_result['new_field_key']

            new_field.field_type = form_result['new_field_type']  # python type

            new_field.field_value = form_result['new_field_value']  # set initial blank value

            new_field.field_desc = form_result['new_field_desc']

            new_field.field_label = form_result['new_field_label']

            Session().add(new_field)

            status=302)

        assert response.location.endswith(url('login_home', came_from=url('edit_repo_perms_revoke', repo_name=HG_REPO)))

        # Test authenticated access

        self.log_user()

        response = self.app.post(

            url('edit_repo_perms_update', repo_name=HG_REPO),

            params=dict(

                perm_new_member_1='repository.read',

                perm_new_member_name_1=user.username,

                perm_new_member_type_1='user',

                _authentication_token=self.authentication_token()),

            status=302)

        assert response.location.endswith(url('edit_repo_perms_update', repo_name=HG_REPO))

        response = self.app.post(

            url('edit_repo_perms_revoke', repo_name=HG_REPO),

            params=dict(

                obj_type='user',

                user_id=user.user_id,

                _authentication_token=self.authentication_token()),

        assert not response.body