问

AngularJS将$ resource作为指令参数传递

相依相伴一起慢慢变老发布于 2023-02-13 13:29

api

我刚刚提出了一个指令,根据来自API调用($ resource)的列表加载一个下拉框.

控制器:

App.controller(
'TestCtrl', [
'$scope', 'countriesFactory',
function($scope, countriesFactory){

        /* Call API */
        countriesFactory().then(function(data){
              $scope.countryList = data;
        });

}])

API调用返回:

{"country":[{"code":"ABW","label":"Aruba"},{"code":"AFG","label":"Afghanistan"},{"code":"AGO","label":"Angola"}]}

模板:

指示:

App
.directive("inputSelect"
, function() {

    var Template =
        '';

    return {
        restrict: 'EA',
        template: Template,
        scope: {
            modelRefList: '='       
        },
        link: function(scope){
          console.log(scope.modelRefList);
        }
      };
   }
);

首先:我简化了很多整体问题,因此看起来该指令在这种情况下完全矫枉过正,但最终却不是:D.

问题:我的console.log始终未定义.

我做了一些研究,并意识到我需要玩承诺等待我的国家名单似乎实际上给了指令.所以我尝试修改我的控制器而不是使用API调用promise的结果,而是直接使用资源本身:

新控制器:

App.controller(
'TestCtrl', [
'$scope', 'countriesFactory',
function($scope, countriesFactory){

        /* Call API */
        $scope.countryList = resourceAPICall();

}])

但仍未定义:/.

我怎样才能将direclty资源(包含我可以用来推迟select的加载的承诺)传递给指令？

ANGULARJS 1.2的解决方案:

指示:

App
.directive("inputSelect"
, function() {

    var Template =
        '';

    return {
        restrict: 'EA',
        template: Template,
        scope: {
            modelRefList: '='       
        },
        link: function(scope){
           scope.modelRefList.$promise.then(function(data){
                    console.log(data);
           }
      };
   }
);

要将API调用结果传递给指令,您需要传递其资源并在指令本身内使用其promise.

谢谢大家的帮助.

1 个回答

这里我们使用包装器模拟异步调用工厂$q.

我们改变了modelReflist对modelRefList

添加ng-model="item"到模板

HTML

<div ng-controller="TestCtrl">
    <input-select model-ref-list="countryList"></input-select>    
</div>

var App = angular.module('myModule', ['ngResource']);

App.controller(
    'TestCtrl', [
    '$scope', 'countriesFactory',

function ($scope, countriesFactory) {
    /* Call API */
    countriesFactory.resourceAPICall().then(function (data) {

        $scope.countryList = data.country;

         console.log($scope.countryList);
    });
}])

App.$inject = ['$scope', 'countriesFactory'];


App.directive("inputSelect", function () {
    var Template = '<select ng-model="item" ng-options="item.label as item.label for item in modelRefList" required></select>';
    return {
        restrict: 'EA',
        template: Template,
        scope: {
            modelRefList: '='
        },
        link: function (scope) {
            console.log(scope.countryList);
        }
    };
});

App.factory('countriesFactory', ['$resource', '$q', function ($resource, $q) {
    var data = {
        "country": [{
            "code": "ABW",
            "label": "Aruba"
        }, {
            "code": "AFG",
            "label": "Afghanistan"
        }, {
            "code": "AGO",
            "label": "Angola"
        }]
    };

    var factory = {
        resourceAPICall: function () {
            var deferred = $q.defer();

            deferred.resolve(data);
            return deferred.promise;
        }
    }
    return factory;
}]);

演示 Fiddle

2023-02-13 13:32 回答

开心就好一切美好

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