AngularJS,工厂,然后执行POST然后GET方法

时间:2015-01-28 17:58:24

标签: javascript json angularjs angularjs-scope

使用AngularJS执行REST请求时遇到一些问题。 我用PHP(Laravel)完成了服务器部分,我用POSTMAN测试它,它工作正常。我只有POST /表达式,我发送json像{"expression":"(2+5)"},我会得到json像{"expression":"(2+5)","result":"7"},当我做几个POST请求时,我需要在result.html页面上连接结果。我为路由提供写了app.js,我有contoller.js

//post expression
myApp.controller('expressionController', ['$scope', 'postExpressionFactory', 'getExpressionFactory','$location',
    function ($scope, postExpressionFactory,getExpressionFactory, $location) {
        $scope.postNewExpression = function () {
            $scope.results = postExpressionFactory.evaluate({'expression':$scope.expression});
            console.log($scope.results.expression);
            console.log($scope.results.result);
        };
    }]);

并在services.js中设有工厂

//post factory
myServices.factory('postExpressionFactory', ['$resource',
    function ($resource) {
        return $resource('../server.php/expression', {}, {
            evaluate: {method: 'POST', headers: {'Content-Type': 'application/json'}, isArray: false}
        });
    }]);

并拥有调用此帖子请求的html

<form>
    <div class="row">
        <div class="col-lg-12">
            <div class="form-group">
                <label class="control-label">Enter expression</label>
                <div class="input-group">
                    <span class="input-group-addon">=</span>
                    <input class="form-control" type="text" id="expression" name="result" ng-model="expression" ng-required="true">
                    <span class="input-group-btn">
                        <button class="btn btn-default" type="button" ng-click="postNewExpression()">Calculate</button>
                    </span>
                </div>
                <h2>Results</h2>
                <div class="list-group" ng-repeat="res in results">
                    <a class="list-group-item">
                        <h4 class="list-group-item-heading">{{res.expression}}</h4>
                        <h4 class="list-group-item-heading">{{res.result}}</h4>
                    </a>
                </div>
            </div>
        </div>
    </div>
</form>

Angular运行正常,我想我没有让json正确,当我在mozilla-&gt;网络中执行此操作时,我看到我已经完成了POST请求,并且我得到了json respone结果:“7”,表达式:( 2 + 5)。我怎样才能得到这个结果 - &gt; 7在results.expression,results.result?

1 个答案:

答案 0 :(得分:1)

您的$ scope.results对象被定义为具有两个属性,但是当您在ng-repeat中迭代它时,您尝试访问不存在的字符串的属性,因此它会无声地失败。

// your results object:
$scope.results = postExpressionFactory.evaluate({'expression':$scope.expression});

// so your object looks like this:
{
    expression: something,
    result: somethingElse,
}

您尝试访问它的方式:

<div class="list-group" ng-repeat="res in results">
     <a class="list-group-item">
         <h4 class="list-group-item-heading">{{res.expression}}</h4>
         <h4 class="list-group-item-heading">{{res.result}}</h4>
     </a>
</div>

通过打印对象来查看HTML中的错误:

<div class="list-group" ng-repeat="res in results">
     {{ result }}
     <a class="list-group-item">
         <h4 class="list-group-item-heading">{{res.expression}}</h4>
         <h4 class="list-group-item-heading">{{res.result}}</h4>
     </a>
</div>

// what you probably want is an array for the results, then push onto the array
$scope.results = [];

// push
$scope.results.push(postExpressionFactory.evaluate({'expression':$scope.expression}));