php根据选择下拉结果判断是否显示全部的结果

            this.get = function() {
                $http.get(‘/m/employee/logs/‘ + employeeLogs.selectedEmployee).success(function(data) {
                    if (data.status == 200 && data.data) {
                        employeeLogs.logs = data.data;
                        if (employeeLogs.selectedEmployee === "") {
                            employeeLogs.employees = _.uniq(_.map(data.data, _.iteratee(‘userid‘)));
                        }
                    }
                });
            };