数组推送,重复元素

时间:2016-01-25 16:37:13

标签: javascript angularjs

这是我的HTML:

<body ng-app="app">

<div ng-controller="AppController as vm">

    <form name="testForm" ng-submit="vm.submit(vm.message)" class="form-group">
        <textarea ng-model="vm.message.text" placeholder="text" class="form-control"></textarea>
        <input type="hidden" ng-model="vm.message.date">
        <input type="submit" class="btn btn-primary">
    </form>

    <table class="table table-stripped table-bordered">
        <tr ng-repeat="message in vm.messages track by $index">
            <td>{{ message.text }}</td>
            <td>{{ message.date }}</td>
        </tr>
    </table>

</div>

这是我的控制者:

    (function(){
    'use strict';

    angular.module('app', [
        'ngRoute'
    ]).controller('AppController', AppController);

    function AppController() {

        var vm = this;        
        vm.submit = submit;                
        vm.messages = [];

        function submit(elem) {
            elem.date = new Date();
            vm.messages.push(elem);
        }  

    }
})();  

我不明白,每当我输入并提交消息对象时, vm.messages 数组中的所有对象都会成为该对象。

我想保存数组中的所有对象而不做任何更改。我究竟做错了什么?

2 个答案:

答案 0 :(得分:4)

您只使用一个消息对象,因此您始终可以添加对它的引用。

在提交

时创建新对象

    (function(){
    'use strict';

    angular.module('app', [
        
    ]).controller('AppController', AppController);

    function AppController() {

        var vm = this;        
        vm.submit = submit;                
        vm.messages = [];
        vm.message = {}; //create object

        function submit(elem) {
            elem.date = new Date();
            vm.messages.push(elem);
            vm.message = {}; //create new object
        }  

    }
})();  
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script>
<div ng-app="app" ng-controller="AppController as vm">

    <form name="testForm" ng-submit="vm.submit(vm.message)" class="form-group">
        <textarea ng-model="vm.message.text" placeholder="text" class="form-control"></textarea>
        <input type="hidden" ng-model="vm.message.date">
        <input type="submit" class="btn btn-primary">
    </form>

    <table class="table table-stripped table-bordered">
        <tr ng-repeat="message in vm.messages track by $index">
            <td>{{ message.text }}</td>
            <td>{{ message.date }}</td>
        </tr>
    </table>

</div>

答案 1 :(得分:0)

嗯,你没有在任何地方定义vm.message?我认为也可以将提交功能存储为vm的一部分:

(function(){
    'use strict';

    angular.module('app', [
        'ngRoute'
    ]).controller('AppController', AppController);

    function AppController() {

        var vm = this;        
        vm.submit = submit;
        vm.message = {};      
        vm.messages = [];

        vm.submit = function(elem) {
            elem.date = new Date();
            vm.messages.push(elem);
        }  

    }
})();