一尘不染

错误:未知提供程序:$ elementProvider <-$ element

angularjs

我试图在angularjs应用程序中使用路由,如下所示:

app.js

    angular.module('productapp', []).
    config(['$routeProvider', function($routeProvider) {
    $routeProvider.
        when('/productapp', {templateUrl: 'partials/productList.html',   controller: productsCtrl}).
        //~ when('/productapp/:phoneId', {templateUrl: 'partials/phone-detail.html', controller: PhoneDetailCtrl}).
        otherwise({redirectTo: '/productapp'});
}]);

controller.js

function productsCtrl($scope, $http, $element) {
        //~ $scope.url = 'php/search.php'; // The url of our search
        // The function that will be executed on button click (ng-click="search()")
        $http.get('php/products.php').success(function(data){
            alert("hi");
            $scope.products = data;
        });

    $scope.search = function() {
        var elem = angular.element($element);
        var dt = $(elem).serialize();
        dt = dt+"&action=index";
        alert(dt);
        console.log($(elem).serialize());
        $http({
            method: 'POST',
            url: 'php/products.php',
            data: dt,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'}
        }).success(function(data, status) {
            //console.log(data);
            $scope.products = data; // Show result from server in our <pre></pre> element
        }).error(function(data, status) {
            $scope.data = data || "Request failed";
            $scope.status = status;
        });
    }; //....

index.html

<html ng-app = "productapp">
<head>
<title>Search form with AngualrJS</title>
        <script src="../angular-1.0.1.min.js"></script>
        <script src="http://code.jquery.com/jquery.min.js"></script>
        <script src="js/products.js"></script>
        <script src="js/app.js"></script>
</head>
<body>
    <div ng-view></div>
</body>
</html>

productList.html

<div>
            <label>Search</label>
            <input type="text" name="searchKeywords" ng-model="keywords" placeholder="enter name..." value="{{rs.name}}">
            <button type="submit" ng-click="search()">Search</button>
            <label>Add New Product:</label>
            <input type="text" name="keywords" ng-model="rs.name" placeholder="enter name..." value="{{rs.name}}">
            <input type="text" name="desc" ng-model="rs.description" placeholder="enter description..." value="{{rs.description}}">
            <button type="submit" ng-click="add()">Add</button>
            <button type="submit" ng-click="save(rs.product_id)">Save</button>

            <p>enter product name...</p>
            <table border='2'>
                <th>Name</th>
                <th>Description</th>
                <th>Edit</th>
                <th>Delete</th>

                <tr ng-repeat="product in products" ng-model = 'products'>
                <td>{{product.name}}</td>
                <td>{{product.description}}</td>
                    <td><a href='' ng-click = "fetch(product.product_id)">edit</a></td>
                    <td> <a href='' ng-click = "del(product.product_id)" ng-hide="isHidden">delete</a></td>
                </tr>
            </table>
</div>

当我运行此代码时,我在(谷歌浏览器的)控制台中收到以下错误:

Error: Unknown provider: $elementProvider <- $element

我开始知道发生此错误,因为我$element在productsCtrl中使用。但是那我该怎么办?我该如何解决这个问题?


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2020-07-04

共1个答案

一尘不染

$ element是不可注入的(它不是在AngularJS注入器中注册的东西),因此您不能以这种方式将其传递到控制器中。

由于ng-
model指令,您的productsCtrl以及您的search()方法都可以访问所有表单数据,该指令在您的表单和控制器之间建立了双向绑定。例如,在search()方法内部,您已经可以使用$
scope.keywords这样的关键字。

看看这是否适合您:

var dt = $($scope.keywords).serialize();  // or maybe just  $scope.keywords.serialize();

更新
:这个小提琴http://jsfiddle.net/michelpa/NP6Yk/似乎在控制器中注入了$
element。(我不确定这是如何/为什么工作……可能是因为控制器已附加到表单标签/指令上?)

更新#2 :可以将$ element注入到控制器中,但是“会与角度方式背道而驰”
-https://groups.google.com/d/msg/angular/SYglWP_x7ew/lFtb75NWNWUJ

如评论中所述,我认为您问题的答案是将表单数据放入单个较大的对象中,并将其发送到$ http请求中。

2020-07-04