Angular ng-repeat 错误“不允许在中继器中重复". [英] Angular ng-repeat Error "Duplicates in a repeater are not allowed."

问题描述

我正在定义一个自定义过滤器，如下所示:

<div class="section comment clearfix" ng-repeat="comment in item.comments | range:1:2">....

如您所见，使用过滤器的 ng-repeat 嵌套在另一个 ng-repeat 中

过滤器定义如下:

myapp.filter('range', function() {返回函数(输入，最小值，最大值){min = parseInt(min);//使字符串输入为int最大 = parseInt(max);for (var i=min; i

我得到:

<块引用>

错误:不允许在中继器中重复.转发器:item.comments 中的评论 |范围:1:2 ngRepeatAction@https://ajax.googleapis.com/ajax/libs/angularjs/1.1.4/an

解决方案

解决方案其实描述在这里:http://www.anujgakhar.com/2013/06/15/duplicates-in-a-repeater-are-not-allowed-in-angularjs/

AngularJS 不允许在 ng-repeat 指令中重复.这意味着，如果您尝试执行以下操作，则会出现错误.

//此代码抛出错误不允许在转发器中重复.//中继器:[1,1,1] 中的行 key: number:1"<div ng-repeat="行在 [1,1,1]">

但是，稍微更改上面的代码以定义一个索引来确定唯一性，如下所示将使其再次工作.

//这会起作用<div ng-repeat="row in [1,1,1] track by $index">

官方文档在这里:https://docs.angularjs.org/error/ngRepeat/dupes

I am defining a custom filter like so:

<div class="idea item" ng-repeat="item in items" isoatom>    
    <div class="section comment clearfix" ng-repeat="comment in item.comments | range:1:2">
        ....
    </div>
</div>

As you can see the ng-repeat where the filter is being used is nested within another ng-repeat

The filter is defined like this:

myapp.filter('range', function() {
    return function(input, min, max) {
        min = parseInt(min); //Make string input int
        max = parseInt(max);
        for (var i=min; i<max; i++)
            input.push(i);
        return input;
    };
});

I'm getting:

Error: Duplicates in a repeater are not allowed. Repeater: comment in item.comments | range:1:2 ngRepeatAction@https://ajax.googleapis.com/ajax/libs/angularjs/1.1.4/an

解决方案

The solution is actually described here: http://www.anujgakhar.com/2013/06/15/duplicates-in-a-repeater-are-not-allowed-in-angularjs/

AngularJS does not allow duplicates in a ng-repeat directive. This means if you are trying to do the following, you will get an error.

// This code throws the error "Duplicates in a repeater are not allowed.
// Repeater: row in [1,1,1] key: number:1"
<div ng-repeat="row in [1,1,1]">

However, changing the above code slightly to define an index to determine uniqueness as below will get it working again.

// This will work
<div ng-repeat="row in [1,1,1] track by $index">

Official docs are here: https://docs.angularjs.org/error/ngRepeat/dupes

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