Question

重复指令从api输出wine记录。我有一个工厂函数来提供葡萄酒API，然后在我的控制器中访问

app.factory("Wine", function ($http){
     var factory = {};

     //getWines 
     factory.getWines = function(){ 
      return $http.get("http://www.greatwines.9000.com")
     }

}

控制器：

    app.controller("winesCtrl", function($scope, $http, Wine){
        Wine.getWines()
         .success(function(wines){
           $scope.wines = wines;
        })
        .error(function(){
             alert("Error!");
         });
    });

VIEW:

<h2>Wine list</h2>
    <div class="row margin-top-20 wine-container" ng-repeat="wine in wines">
        <div class="col-sm-3">
            <img src="{{wine.picture}}" class="img-responsive" />
        </div>
        <div class="col-sm-9">
            <div class="margin-top-20">
                <span class="bold">Name: </span><span>{{wine.name}}</span>
            </div>
            <div>
                <span class="bold">Year: </span><span>{{wine.year}}</span>
            </div>
            <div>
                <span class="bold">Grapes: </span><span>{{wine.grapes}}</span>
            </div>
            <div>
                <span class="bold">Country: </span><span>{{wine.country}}</span>
            </div>
            <div>
                <span class="bold">Region: </span><span>{{wine.region}}</span>
            </div>
            <div>
                <span class="bold">Price: </span><span>{{wine.price}}</span>
            </div>
            <div>
                <span class="bold">{{wine.description}}</span>
            </div>
            <div class="margin-top-20">
                <a href="#/wines/{{wine.id}}" class="btn btn-default">Edit Wine</a>
            </div>
        </div>
    </div>

我点击了这个错误并且在典型的＆＃34;模糊＆＃34; angularjs fashion我得到了这个：

Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: wine in wines, Duplicate key: string:e, Duplicate value: e

这是什么意思？葡萄酒和葡萄酒不一样＃34;那为什么它认为它是重复的？

Answer 1

如果ngRepeat表达式中存在重复键，则会发生。禁止重复键，因为AngularJS使用键将DOM节点与项目关联。

这意味着$ scope.wines有一些重复的值。

您也可以参考以下帖子：Angular ng-repeat Error "Duplicates in a repeater are not allowed."

Answer 2

AngularJS确实使用键将DOM节点与项目关联起来。因此，您可以通过添加"track by $index"来解决。

看起来像这样

ng-repeat="wine in wines track by $index"

错误：[ngRepeat：dupes]这是什么意思？

2 个答案: