javascript - Angular 过滤器和 limitTo 未按预期工作

Question

我是 angular.js 的新手，我看到了一些我不喜欢的东西。当我同时过滤和限制数据时，似乎限制会影响过滤器，并且无法在原始数组源中搜索。我错过了什么吗？

更新:事情是我正在尝试创建一个带有分页、过滤器和其他一些东西的简单数据表指令，但这让我发疯。我已经看到了答案和评论，我想知道我试图达到的过程是否错误，但是不，从逻辑上讲，限制一定不会影响过滤器(我认为是这样)，因为也许在某些时候你会'需要在整个源中搜索，而不是有限的部分，它们应该是分开的行为。这不是我在主要数据表框架中看到的默认行为吗？

以下是描述该问题的示例:

angular.module('ngRepeat', ['ngAnimate']).controller('repeatController', function($scope) {
        $scope.q="john"
        $scope.friends = [
          {name:'John', age:25, gender:'boy'},
          {name:'Jessie', age:30, gender:'girl'},
          {name:'Johanna', age:28, gender:'girl'},
          {name:'Joy', age:15, gender:'girl'},
          {name:'Mary', age:28, gender:'girl'},
          {name:'Peter', age:95, gender:'boy'},
          {name:'Sebastian', age:50, gender:'boy'},
          {name:'Erika', age:27, gender:'girl'},
          {name:'Patrick', age:40, gender:'boy'},
          {name:'Samantha', age:60, gender:'girl'}
        ];
      });

.example-animate-container {
        background:white;
        border:1px solid black;
        list-style:none;
        margin:0;
        padding:0 10px;
      }

      .animate-repeat {
        line-height:30px;
        list-style:none;
        box-sizing:border-box;
      }

      .animate-repeat.ng-move,
      .animate-repeat.ng-enter,
      .animate-repeat.ng-leave {
        transition:all linear 0.5s;
      }

      .animate-repeat.ng-leave.ng-leave-active,
      .animate-repeat.ng-move,
      .animate-repeat.ng-enter {
        opacity:0;
        max-height:0;
      }

      .animate-repeat.ng-leave,
      .animate-repeat.ng-move.ng-move-active,
      .animate-repeat.ng-enter.ng-enter-active {
        opacity:1;
        max-height:30px;
      }

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular-animate.min.js"></script>
<div ng-app="ngRepeat" ng-controller="repeatController">
The flollowing example shows when you filter and limit the data at the same time, you can not filter the items before the current position.
<br/>
<b>position</b> : 5<br/>
<b>limitTo</b> : 5<br/>
<b>filter</b> : { '$' : '{{q}}' }<br/>
        I have {{friends.length}} friends. They are:
        <input type="search" value="john" ng-model="q" placeholder="filter friends..." aria-label="filter friends" />
        <ul class="example-animate-container">
          <li class="animate-repeat" ng-repeat="friend in friends | filter:q | limitTo : 5 : 5 as result track by $index">
            [{{$index + 1}}] {{friend.name}} who is {{friend.age}} years old.
          </li>
          <li class="animate-repeat" ng-if="results.length == 0">
            <strong>No results found...</strong>
          </li>
        </ul>
<br/>As you can see there's no results.
      </div>

Answer 1

您遇到问题是因为您的 limitTo 限制了 5 个项目(从索引 5 开始)，当您搜索时很可能不会有 5 个项目，尤其是在提供数据的情况下。

改变

limitTo : 5 : 5 track by $index

至

limitTo : 5 track by $index

或

limitTo : 5 : 0 track by $index // 0 = Index at which to begin limitation