Angular - splice 函数总是删除最后一个元素 [英] Angular - splice function always removes last element

问题描述

我有一个对象数组，我想在单击 Delete 键时删除某些对象.但是，无论我创建了多少行，它总是从行数组中删除最后一项.即使我明确地放入这样的一行， $scope.rows.splice(1,1) - 它仍然会删除最后一个元素，而不是第二个.

JS

angular.module('app', ['ngAnimate', 'ui.bootstrap']).directive('queryBuilder', function() {返回 {限制:'E'，范围: {}，控制器:功能($范围){$scope.rows = [{}]$scope.$on('addRowRqst', function(evt) {//evt.stopPropagation()$scope.rows.push({})});$scope.$on('removeRowRqst', function(evt, args) {//evt.stopPropagation()//这是删除发生的地方$scope.rows.splice($scope.rows.indexOf(args),1);});},templateUrl: 'queryBuilderTemplate.html',}}).directive('queryRow', function() {返回 {范围: {}，限制:'EA'，templateUrl: 'queryRowTemplate.html',控制器:功能($范围){$scope.addRqst = function() {$scope.$emit('addRowRqst')};$scope.removeRqst = 函数(索引){$scope.$emit('removeRowRqst', index)};},链接:功能(范围，元素，属性){}}});

相关的 HTML 代码片段

<代码>....<button class="btn btn-default" ng-click="removeRqst($parent.row)" type="submit">删除行</button>....

Plunker:http://plnkr.co/edit/rDkXpIgiOSoNvLNPsVbP

测试:点击添加行 3 次.然后单击第二行的删除.您会看到它实际上删除了第 3 行，而不是第 2 行

解决方案

只是为了清楚@ZsoltGyöngyösi 给出的答案:

<块引用>

带有 id 字段的每个元素都需要 ng-model="$parent.row.field"

因此，如果您这样设置 queryRowTemplate.hml，正确的行将被删除:

queryRowTemplate.html

<label for="selectedField">选择字段</label><select id="selectedField" class="form-control" ng-model="$parent.row.field"><option>title</option><option>应用</option><选项>主题</选项><option>文件类型</option></选择>
<div class="form-group col-md-3"><label for="logicalOperator">逻辑运算符</label><select id="logicalOperator" class="form-control" ng-model="$parent.row.logical"><option>等于</option><option>不等于</option></选择>

<div class="form-group col-md-3"><label for="searchText">搜索</label><input id="searchText" class="form-control" type="text" placeholder="search..." ng-model="$parent.row.search"/>

<div class="form-group col-md-3"><label for="operator">运算符(可选)</label><select id="operator" class="form-control" ng-model="$parent.row.operator"><option value=""></option><option>AND</option><option>OR</option></选择>

<button class="btn btn-default" ng-click="addRqst()" type="submit">添加行</button><button class="btn btn-default" ng-click="removeRqst($parent.row)" type="submit">删除行</button>{{$parent.$index}}<小时/>

在此处查看 Plunkr

I have an array of objects that I want to remove certain objects when a Delete key is clicked. However, it always removes the last item from the rows array, no matter how many rows I have created. Even if I explicitly put in a line like so, $scope.rows.splice(1,1) - it will still remove the last element, not the second.

JS

angular.module('app', ['ngAnimate', 'ui.bootstrap'])
  .directive('queryBuilder', function() {
    return {
      restrict: 'E',
      scope: {},
      controller: function($scope) {
        $scope.rows = [{}]

        $scope.$on('addRowRqst', function(evt) {
          // evt.stopPropagation()
          $scope.rows.push({})
        });
        $scope.$on('removeRowRqst', function(evt, args) {
          // evt.stopPropagation()
          //THIS IS WHERE THE REMOVE HAPPENS 
          $scope.rows.splice($scope.rows.indexOf(args),1);
        });        
      },
      templateUrl: 'queryBuilderTemplate.html',
    }
  }).directive('queryRow', function() {
    return {
      scope: {},
      restrict: 'EA',
      templateUrl: 'queryRowTemplate.html',
      controller: function($scope) {
        $scope.addRqst = function() {
          $scope.$emit('addRowRqst')
        };
        $scope.removeRqst = function(index) {
          $scope.$emit('removeRowRqst', index)
        };
      },
      link: function(scope, elem, attrs) {

      }
    }
  });

The relevant snippet of HTML

....
<button class="btn btn-default" ng-click="removeRqst($parent.row)" type="submit">Delete Row</button>
....

Plunker: http://plnkr.co/edit/rDkXpIgiOSoNvLNPsVbP

Test: Click on Add Row 3 times. Then click on Delete on second row. You will see that it actually removes the 3 row, not 2nd

解决方案

Just to be clear with the answer @ZsoltGyöngyösi gave:

Every element with and id field needs ng-model="$parent.row.field"

Thus, the correct row will be deleted if you setup queryRowTemplate.hml this way:

queryRowTemplate.html

<div class="form-group col-md-3">
  <label for="selectedField">Select Field</label>
  <select id="selectedField" class="form-control" ng-model="$parent.row.field">
    <option>title</option>
    <option>application</option>
    <option>subject</option>
    <option>filetype</option>
  </select>
</div>
<div class="form-group col-md-3">
  <label for="logicalOperator">Logical Operator</label>
  <select id="logicalOperator" class="form-control" ng-model="$parent.row.logical">
    <option>equal to</option>
    <option>not equal to</option>
  </select>
</div>
<div class="form-group col-md-3">
  <label for="searchText">Search</label>
  <input id="searchText" class="form-control" type="text" placeholder="search..." ng-model="$parent.row.search" />
</div>
<div class="form-group col-md-3">
  <label for="operator">Operator (optional)</label>
  <select id="operator" class="form-control" ng-model="$parent.row.operator">
    <option value=""></option>
    <option>AND</option>
    <option>OR</option>
  </select>
</div>
<button class="btn btn-default" ng-click="addRqst()" type="submit">Add Row</button>
<button class="btn btn-default" ng-click="removeRqst($parent.row)" type="submit">Delete Row</button>
{{$parent.$index}}
<hr />

See Plunkr, here

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