没有包装的嵌套ngRepeat
[英]nested ngRepeat without a wrapper
问题描述
I have a JS object like this: 
我有一个这样的JS对象：
[
{
selected: true,
itens: [1, 2, 3]
},
{
selected: true,
itens: [4, 5, 6]
},
{
selected: true,
itens: [7, 8, 9]
},
{
selected: true,
itens: [10, 11, 12]
}
]
It is a list of objects that have sublists. 它是具有子列表的对象的列表。 (this is just a simplified form of my real structure) （这只是我实际结构的简化形式）
I would like to print many divs, one for each sublist item. 我想打印许多div，每个子列表项一个。 It would be like this: 就像这样：
<div>1</div>
<div>2</div>
<div>3</div>
<div>...</div>
<div>11</div>
<div>12</div>
But i do not want wrap the parent items in a external div or another element. 但我不想将父项包装在外部div或其他元素中。 And i also would like to hide the subitems of parents with 'selected' attribute false. 我还想隐藏具有“ selected”属性为false的父母的子项。
How can i do this with angular ngRepeat directive? 如何使用angular ngRepeat指令执行此操作？
UPDATE I'm trying to list the elements with bootstrap 'row' and 'col' classes. 更新我正在尝试列出具有引导程序“行”和“ col”类的元素。 each column is 4 bootstrap columns wide. 每列是4个引导程序列宽。
If more than 12 columns are placed within a single row, each group of extra columns will, as one unit, wrap onto a new line.
this is from boostrap documentation. 这是来自boostrap文档。
The resoult should be like this 结果应该是这样的
<div class="row">
<div col-md-4>1</div>
<div col-md-4>2</div>
<div col-md-4>3</div>
<div col-md-4>...</div>
<div col-md-4>11</div>
<div col-md-4>12</div>
</div>
4 个解决方案
解决方案1
2 已采纳 2015-03-18 18:14:51
If you use angular-filter module, you can do that without transforming the model : 如果您使用角度滤波器模块，则无需进行模型转换即可：
<div ng-repeat="item in arrayItems | where: {selected: true} | map: 'subitems' | flatten">
{{item}
</div>
Explanation : 说明：
-
item in arrayItems: We are iterating over the parent array of itemsitem in arrayItems：我们正在迭代item in arrayItems的父数组 -
where: {selected: true}: We keep only those with flagselectedequals to truewhere: {selected: true}：我们仅保留selected了flag等于true的那些标记 -
map: 'subitems': We pluck the propertysubitems(the sub-arrays)map: 'subitems'：我们选择了属性subitems（子数组） -
flatten: We flatten the sub-arrays into one arrayflatten：我们将子阵列展平为一个阵列
解决方案2
1 2015-03-18 17:44:56
It can be possible using ng-repeat itself, only you need to maintain one variable controller. 可以使用ng-repeat本身，只需要维护一个变量控制器即可。
HTML 的HTML
<body ng-controller="DemoCtrl" ng-init="selectedIndex=0">
<div ng-repeat="item in items" ng-click="item.selected = !item.selected; $parent.selectedIndex=$index">Item {{$index}}</div>
<div ng-repeat="item in items[selectedIndex].itens" ng-bind="item"></div>
</body>
Working Plunkr Here 在这里工作的Plunkr
Update: 更新：
We need to make one filter that will manage & create selected values itens array 我们需要制作一个过滤器来管理和创建itens数组的选定值
Filter 过滤
app.filter('showselected',function($filter){
return function(values){
var selectedValues = $filter('filter')(values, {selected: true}), returnValue = [];
console.log(selectedValues)
angular.forEach(selectedValues, function(val, index){
angular.forEach(val.itens, function(v, i){
returnValue.push(v);
});
});
return returnValue;
}
});
Markup 标记
<div ng-repeat="item in items" ng-click="item.selected = !item.selected; $parent.selectedIndex=$index" ng-class="{green: item.selected}">Item {{$index}}</div>
<div ng-repeat="item in items| showselected track by $index" ng-bind="item"></div>
Hope this could help you, Thanks. 希望这可以对您有所帮助，谢谢。
解决方案3
0 2015-03-18 17:36:15
ng-repeat doesn't do this sort of thing out of the box. ng-repeat不会开箱即用。 You'll need to combine all your items arrays into one array that you can iterate over: 您需要将所有项目数组组合成一个可以迭代的数组：
var arr = [];
test.forEach(function (obj) {
arr = arr.concat(obj.itens);
});
Then, you can use the master array in ng-repeat: 然后，您可以在ng-repeat中使用master数组：
<div ng-repeat="val in arr">{{val}}
解决方案4
0 2015-03-18 18:22:09
Here is a working fiddle: http://jsfiddle.net/tsclaus/m3vh0yyc/1/ 这是一个有效的小提琴： http : //jsfiddle.net/tsclaus/m3vh0yyc/1/
Results in exactly 12 divs being the only children of the controller element. 结果恰好12个div是控制器元素的唯一子元素。
<div ng-controller="MyCtrl" class="ng-scope">
<!-- ngRepeat: object in array --><!-- ngIf: false -->
<!-- ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
1
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
2
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
3
</div><!-- end ngRepeat: number in object.itens --><!-- end ngRepeat: object in array --><!-- ngIf: false -->
<!-- ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
4
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
5
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
6
</div><!-- end ngRepeat: number in object.itens --><!-- end ngRepeat: object in array --><!-- ngIf: false -->
<!-- ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
7
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
8
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
9
</div><!-- end ngRepeat: number in object.itens --><!-- end ngRepeat: object in array --><!-- ngIf: false -->
<!-- ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
10
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
11
</div><!-- end ngRepeat: number in object.itens --><div ng-repeat="number in object.itens" ng-repeat-end="" class="ng-binding ng-scope">
12
</div><!-- end ngRepeat: number in object.itens --><!-- end ngRepeat: object in array -->
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