Question

我在选择元素上使用自定义排序过滤器和ng-options时遇到问题。问题是它没有对我的数值进行排序。

您可以在下面的plnkr中看到问题，它应该对'id'值进行排序，但select元素中的排序非常奇怪。

http://plnkr.co/edit/Z99aEFLuWUFWuyc8GM9t?p=preview

var app = angular.module('testApp', []);

app.filter('sortKeyIds', function() {
    return function(input) {
      
        //Copy original list
        var keys = input.concat([]);
        
        keys.sort(function(a, b) {
            return a.id - b.id;
        });
        
        return keys;
    }
});

app.controller('MainController', function($scope) {
    $scope.controllerName = "MainController";
    $scope.months = [
      {"id":15,"val":"15x250"},
      {"id":88,"val":"88x31"},
      {"id":120,"val":"120x90"},
      {"id":125,"val":"125x125"},
      {"id":160,"val":"160x600"},
      {"id":180,"val":"180x150"},
      {"id":234,"val":"234x60"},
      {"id":240,"val":"240x400"},
      {"id":250,"val":"250x250"},
      {"id":300,"val":"300x100"},
      {"id":336,"val":"336x280"},
      {"id":468,"val":"468x60"},
      {"id":720,"val":"720x300"},
      {"id":728,"val":"728x90"},
      {"id":980,"val":"980x300"},
      {"id":1250,"val":"1250x250"}
      ];
});

<!-- begin snippet: js hide: false console: true babel: false -->

<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="utf-8" />
    <title>AngularCameraApp</title>
    <link rel="stylesheet" href="style.css" />
    <script src="https://code.angularjs.org/1.3.15/angular.js"></script>
  </head>

  <body ng-app="testApp" ng-controller="MainController">
    <h3>Weird sorting</h3>
    <select ng-model="avtripExpMonth" ng-options="value.lang as value.val for (key, value) in months | sortKeyIds"></select>
  </body>

</html>

Answer 1

＆＃13;

var app = angular.module('testApp', []);

/* You could remove this part.
app.filter('sortKeyIds', function() {
    return function(input) {
      
        //Copy original list
        var keys = input.concat([]);
        console.log(keys);
        keys.sort(function(a, b) {
            return a.id - b.id;
        });
        
        return keys;
    }
});*/

app.controller('MainController', function($scope) {
    $scope.controllerName = "MainController";
    $scope.months = [
      {"id":15,"val":"15x250"},
      {"id":88,"val":"88x31"},
      {"id":120,"val":"120x90"},
      {"id":125,"val":"125x125"},
      {"id":160,"val":"160x600"},
      {"id":180,"val":"180x150"},
      {"id":234,"val":"234x60"},
      {"id":240,"val":"240x400"},
      {"id":250,"val":"250x250"},
      {"id":300,"val":"300x100"},
      {"id":336,"val":"336x280"},
      {"id":468,"val":"468x60"},
      {"id":720,"val":"720x300"},
      {"id":728,"val":"728x90"},
      {"id":980,"val":"980x300"},
      {"id":1250,"val":"1250x250"}
      ];
});

＆＃13;

/* Styles go here */

.one {
  font-size:2em;
}
.two {
  color:red;
}
.aclass {
  text-align:center;
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="utf-8" />
    <title>AngularCameraApp</title>
    <script data-require="jquery@*" data-semver="3.0.0" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="https://code.angularjs.org/1.3.15/angular.js"></script>
    <script src="https://code.angularjs.org/1.3.15/angular-route.js"></script>
    <script src="script.js"></script>
  </head>

  <body ng-app="testApp" ng-controller="MainController">
    <h3>Weird sorting</h3>
    <select ng-model="avtripExpMonth" ng-options="month.val for month in months track by month.id | orderBy:month.id"></select>
    <ul id="preview"></ul>
  </body>

</html>

＆＃13;

你可以使用Angular的orderBy过滤器。不确定为什么要使用自定义过滤器来完成一项简单的任务。

this fiddle 为您效劳。我真的不了解你的(key, value)。我就是这样做的。

Answer 2

这并不奇怪。您没有使用正确的语法。 Angular破坏了那个过滤器。

您在ng-options上不需要(key, value)。并且过滤器语法是正确的。

以下是更新后的Plunker

<select ng-model="avtripExpMonth" ng-options="value.lang as value.val for value in months | sortKeyIds"></select>

我刚刚将其更改为value，一切正常。

希望有所帮助

在ng-options上使用自定义排序过滤器时出现奇怪的排序行为

2 个答案: