Question

我正在使用angularJS和一个使用socketio发送数据的节点后端。然后我尝试使用ng-repeat显示数据。如果我初始化控制器内的数据，那么ng-repeat工作正常，但是如果我从服务器接收数据时添加数据，那么当使用ng-repeat时屏幕上不会显示任何内容。

以下是我正在使用的代码片段：（trans.html）

<div id='trans' ng-app='MyApp'>
    <h1>Transactions</h1>
    <div class="pure-g-r" ng-controller='TransController'>
        <div class="pure-u-1-2" ng-repeat="trans in transactions">
            <h1>{{ trans.name }}</h1>
            <p>{{ trans.description}}</p>
            <p>{{ trans.date }}</p>
            <p>{{ trans.category }}</p>
        </div>
    </div>

</div>

<script src="/js/loadAngular.js"></script>

（controller.js）

  function TransController($scope, socket) {
    $scope.transactions = [];
    $scope.currentMonth = "March";
    $scope.categories = [];

    init();

    function init() {
        console.log("emitting init functs");
        socket.emit('data', {request: 'transactions', month: $scope.currentMonth});
        socket.emit('getCategories', {});
    };

    socket.on('dataResponse', function (data) {
        console.log(data);  
        if(data.response === 'transactions'){
            $scope.transactions = [];
            var tran = data.data;
            for(var i = 0; i < tran.length; i++){
                $scope.transactions.push(tran[i]);
                console.log(tran[i]);
            };
        }
        console.log($scope.transactions);
        console.log("CURRENT MONTH " + $scope.currentMonth);
    });

（server.js）

   var myTransactions = {
        January : [{
            name: "Tesco shopping",
            date: "January",
            description: "This is my description, I went to the shop and bought loads of food.",
            category: "Food"
    }],
        February : [],
        March : [{
            name: "Booze shopping",
            date: "March",
            description: "This is my description, I went to the shop and bought loads of food.",
            category: "Food"
    },{
            name: "Tesco shopping",
            date: "March",
            description: "This is my description, I went to the shop and bought loads of food.",
            category: "Food"
    }],
    ...
    };

    mudev.addCustomEvent('data', function(socket,data){
        var request = data.request;
        var month = data.month;
        console.log("Data Request: request:",request, " month:",month);
        if(month==null){
            socket.emit('dataResponse', {
                response: 'transactions',
                data: myTransactions
            });
        }else{
            socket.emit('dataResponse', {
                response: 'transactions',
                data: myTransactions[month]
            })
        }

    });

我可以在数据之间看到的唯一区别是，当我静态初始化控制器内部的数据时，有一个名为“HashKey”的额外密钥，当从服务器发送数据时，该密钥不存在。我再次阅读了角度文档，但无法找到有关此问题的任何内容。

非常感谢任何帮助。（这与此ng-repeat over an array of objects）

的问题不同

Answer 1

$ $范围应用（）;

用于函数回调。

Answer 2

正如Eugene P建议的那样，添加$ scope。$ apply（）刷新视图以更新数据。将此添加到dataResponse回调的末尾会更新屏幕上的数据。

这篇文章（我已经忘记了）使用有角度的socketio更详细地解释。 http://www.html5rocks.com/en/tutorials/frameworks/angular-websockets/

感谢您的回答：）

ng-repeat对象数组nodejs

2 个答案: