当我将$state / $stateParams注入指令时,它们在unique函数中不可用,为什么？
'use strict';
angular.module('TGB').directive('uniqueSchoolclassnumberValidator',function (schoolclassCodeService) {
return {
restrict: 'A',require: 'ngModel',link: function (scope,element,attrs,ngModel) {
ngModel.$asyncValidators.unique = function (schoolclassNumer) {
var schoolyearId = 1; // Read schoolyearId from the $stateParams.id but how to inject?
return schoolclassCodeService.exists(schoolyearId,schoolclassNumber);
};
}
};
});
UPDATE
正如您在我的谷歌Chrome控制台中看到的那样$stateParams或$state未定义！
您将需要一个Controller作为指令的一部分,其中可以注入$stateParams.沿着这些方向的东西应该工作(未经测试)
(function (){
angular
.module('TGB')
.directive('uniqueSchoolclassnumberValidator',schoolclassDirective);
schoolclassDirective.$inject = ['$state','$stateParams','$compile','schoolclassCodeService'];
function schoolclassDirective($state,$stateParams,$compile,schoolclassCodeService) {
var directive = {
restrict: 'A',controller : MyController
link: function (scope,listOfCtrls) {
// you will need to get the ngModelCtrl from the list of controllers as you have the require field set above
var ngModelCtrl = listOfCtrls[0]//[1];
var myCtrl = listOfCtrls[1]//[0];
ngModelCtrl.$asyncValidators.unique = function (schoolclassNumer) {
var schoolyearId = myCtrl.id;
return schoolclassCodeService.exists(schoolyearId,schoolclassNumber);
};
};
};
function MyController($state,$stateParams){
var scope = this;
scope.id= $stateParams.schoolyearId;
}
return directive;
}}
另请注意wiki中$stateParams的使用情况
如果它是父状态的一部分,获得1which的另一种方法是定义解决方案function of the parent state并在控制器内使用它.
