Javascript 在另一个 ng-repeat 中使用 ng-repeat
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using ng-repeat inside another ng-repeat
提问by Bruno Ornelas
I'm developing a page where I need to show some boxes (using ng-repeat) that contains info of channels and where it will be shown (which are cities).
我正在开发一个页面，我需要在其中显示一些框（使用ng-repeat），其中包含频道信息及其显示位置（城市）。
The problem I am facing is when I repeat the second ng-repeat:
我面临的问题是当我重复第二个时ng-repeat：
<table class="table table-condensed" ng-init="nitsCh = [objsCh[$index].nit]">
This should get the $index of first ng-repeat and create a new array with the places the channels will be shown. And it does exactly that. But, when I apply the second ng-repeat using this array, it doesn't work properly.
这应该获得第一个 ng-repeat 的 $index 并创建一个新数组，其中包含将显示频道的位置。而它正是这样做的。但是，当我使用此数组应用第二个 ng-repeat 时，它无法正常工作。
Said that my html looks like this (PS: I need to use the index value instead of objCh.namebecause I place these boxes into columns)
说我的html看起来是这样的（PS：我需要使用索引值而不是objCh.name因为我将这些框放入列中）
<div class="box box-solid box-default" ng-repeat="(indexO, objCh) in objsCh track by indexO" ng-if="indexO%4==0 && indexO<=10">
<div class="box-header">
<div class="pull-left">
<img src="dist/img/channels/{{ objsCh[indexO].pic }}" data-toggle="tooltip" title="" data-original-title="Alterar logo do canal">
<h3 class="box-title">{{ objsCh[(indexO)].name }}</h3>
</div>
<div class="box-tools pull-right">
<button class="btn btn-box-tool" data-toggle="tooltip" title="" data-original-title="Adicionar ou Remover NIT"><i class="fa fa-plus"></i></button>
</div>
</div>
<div class="box-body">
<table class="table table-condensed" ng-init="nitsCh = [objsCh[indexO].nit]">
<tbody>
<tr>
<th style="width: 10px">#</th>
<th>Nit</th>
</tr>
<tr ng-repeat="(indexN,nitCh) in nitsCh track by indexN">
<td>{{ objsCh[(indexO + 1)].nit[indexN].num }}</td>
<td>{{ objsCh[(indexO + 1)].nit[indexN].name }}</td>
</tr>
</tbody>
</table>
</div>
</div>
The JS file looks like this:
JS 文件如下所示：
var app = angular.module('appApp', []);
app.controller('ctrlApp', function($scope, $http) {
var url = "includes/exibChNit.php";
$http.get(url).success(function(response) {
all = response;
$scope.objsCh = all.channels;
});
});
And the json file (that php create) looks like this:
json 文件（由 php 创建）如下所示：
{
"channels": [{
"id": "1",
"sid": "1",
"name": "Channel",
"pic": "channel.jpg",
"crc32": "A1g423423B2",
"special": "0",
"url": "",
"key": "",
"type": "",
"city": [{
"num": "1",
"name": "S?o Paulo"
}, {
"num": "2",
"name": "Rio de Janeiro"
}]
}, {
"id": "2",
"sid": "2",
"name": "CHannel 1",
"pic": "channel.jpg",
"crc32": "A1F5534234B2",
"special": "0",
"url": "",
"key": "",
"type": "",
"city": [{
"num": "1",
"name": "S?o Paulo"
}, {
"num": "2",
"name": "Rio de Janeiro"
}]
}]
}
When I try this it works:
当我尝试这个时它有效：
<table class="table table-condensed" ng-init="nitsCh = [objsCh[($parent.$index + 1)].nit]">
But I can't make it this way because the json nodes will be dynamic.
但我不能这样做，因为 json 节点将是动态的。
Thanks in advance!
提前致谢！
回答by jakeforaker
ng-repeat's create their own $scope.
ng-repeat的创建自己的$scope。
So, for the inner ng-repeats, you have access to $parent.$index, where $parentis the parent scope of the current repeat block.
因此，对于内部NG-重复，您可以访问$parent.$index，在那里$parent是当前重复块的父范围。
For ex:
例如：
<ul ng-repeat="section in sections">
<li>
{{section.name}}
</li>
<ul>
<li ng-click="loadFromMenu($parent.$index)" ng-repeat="tutorial in section.tutorials">
{{tutorial.name}}
</li>
</ul>
</ul>
Plunkr http://plnkr.co/edit/hOfAldNevxKzZQlxFfBn?p=preview
Plunkr http://plnkr.co/edit/hOfAldNevxKzZQlxFfBn?p=preview
(simplified from this answer passing 2 $index values within nested ng-repeat)
（从这个答案中简化，在嵌套的 ng-repeat 中传递 2 $index 值）
