"解析工厂中声明的数组时,无法读取未定义的属性'id'

Question

我正在构建一个基本应用程序(使用MEAN Web框架和节点webkit),以便更好地理解angularjs.

这是我的内容 notificationFactory.js

function notificationFactory() {

    var fooMessages = [

        {
            id: 4,
            dismissable: true,
            name: "fooooBaaar",
            function: '',
            showInTopBar: false,
            priority: "high",
            icon: 'fooIconBarBarBar',
            topBarIcon: 'fooIconIconIcon'
        },

        {
            id: 3,
            dismissable: true,
            name: "foofooBarBar",
            function: '',
            showInTopBar: false,
            priority: "high",
            icon: 'fooIconfooIcon',
            topBarIcon: 'IconIconIcon'
        },

        {
            id: 2,
            dismissable: true,
            name: "foo foo",
            function: '',
            showInTopBar: false,
            priority: "high",
            icon: 'fooBaaaaaar',
            topBarIcon: 'IconFooIcon'
        },

        {
            id: 1,
            dismissable: true,
            name: "foo",
            function: '',
            showInTopBar: false,
            priority: "high",
            icon: 'fooIcon',
            topBarIcon: 'fooIconIcon'
        },
    ]

    fooMessages.TopBarDismiss = function (message) {
        $.each(fooMessages, function (i, v) {
            if(v.id = message.id) {
                fooMessages.splice(i,1);
            }
        });

    }

    return fooMessages;

}

angular.module('fooDemo').factory('notificationFactory', notificationFactory);

我TopBarDismiss()使用以下方法在HTML模板中调用该函数:

<div class="fooDismiss" ng-click="notificationFactory.TopBarDismiss(message)">Dismiss</div>

当我按下我的Dismiss"按钮"后退出控制台时,我明白了:

 TypeError: Cannot read property 'id' of undefined
at notificationFactory.js:94
at Function.m.extend.each (jquery.min.js:2)
at Array.fooMessages.TopBarDismiss (notificationFactory.js:93)
at fb.functionCall (angular.js:10847)
at angular-touch.js:472
at k.$get.k.$eval (angular.js:12702)
at k.$get.k.$apply (angular.js:12800)
at HTMLDivElement.<anonymous> (angular-touch.js:471)
at angular.js:3097
at r (angular.js:325)angular.js:10072 (anonymous function)angular.js:7364 $getangular.js:12802 $get.k.$applyangular-touch.js:471 (anonymous function)angular.js:3097 (anonymous function)angular.js:325 rangular.js:3096 r.triggerHandlerangular.js:3111 S.(anonymous function)angular-touch.js:453 (anonymous function)angular.js:2853 (anonymous function)angular.js:325 rangular.js:2852 c

所以一定是

$.each(fooMessages, function (i, v) {
    if (v.id == message.id) {
    } 
});

部分非常可怕.

伙计们,你能为我发现错误吗？

Answer 1

首先,如评论中所述,您需要确保message传递的对象确实是您正在寻找的对象.

然后,如果你只想拼接,你可以这样做:

fooMessages.TopBarDismiss = function (message) {
        var index;
        for (var i = 0; i < fooMessages.length; i++) {
            if(fooMessages[i].id == message.id) {
                index = i;
                break;
            }
        }
        if (index) {
              fooMessages.splice(index,1);
        } 

}