Question

在Angular中，有没有办法修改过滤器，只返回完全匹配？

示例：

var words = [
    {   title: "ball"   },
    {   title: "wall"   },
    {   title: "all"    },
    {   title: "alloy"  }
];

var wordsFiltered = filter('filter')
( 
    words, 
    { 
        'title': 'all'
    } 
);

以上将匹配'ball'，'wall'，'all'和'alloy'。但我希望它只匹配'全部'。有什么方法可以改变吗？

Answer 1

更新

从AngularJS v.1.1.3开始，精确过滤为provided natively：

Find words that exactly match title: 
<input ng-model="match.title" />
<br>
and exactly match type: 
<input ng-model="match.type" />
<hr>
<table>
  <tr ng-repeat="word in words | filter:match:true">
   <td>{{word.title}}</td> 
  </tr>
</table>

Plunker

你的问题意味着你想要匹配多个对象属性，所以这里有一个过滤器来做到这一点：

app.controller('AppController',
    [
      '$scope',
      function($scope) {
        $scope.match = {};
        $scope.words = [
          { title: "ball", type: 'object' },
          { title: "wall", type: 'object' },
          { title: "all", type: 'word' },
          { title: "alloy", type: 'material' }
        ];

      }
    ]
  );

app.filter('exact', function(){
  return function(items, match){
    var matching = [], matches, falsely = true;

    // Return the items unchanged if all filtering attributes are falsy
    angular.forEach(match, function(value, key){
      falsely = falsely && !value;
    });
    if(falsely){
      return items;
    }

    angular.forEach(items, function(item){ // e.g. { title: "ball" }
      matches = true;
      angular.forEach(match, function(value, key){ // e.g. 'all', 'title'
        if(!!value){ // do not compare if value is empty
          matches = matches && (item[key] === value);  
        }
      });
      if(matches){
        matching.push(item);  
      }
    });
    return matching;
  }
});

<body ng-controller="AppController">

  Find words that exactly match title: 
  <input ng-model="match.title" />
  <br>
  and exactly match type: 
  <input ng-model="match.type" />
  <hr>
  <table>
    <tr ng-repeat="word in words | exact:match">
     <td>{{word.title}}</td> 
    </tr>
  </table>  
</body>

PLUNKER

Answer 2

试试这个：

var words = [
    {   title: "ball"   },
    {   title: "wall"   },
    {   title: "all"    },
    {   title: "alloy"  }
];

var wordsFiltered = filter('filter')
( 
    words, 
    { 
        'title': 'all'
    },
    true
);

Answer 3

您可以使用Regex实现简单的实现：

<input ng-model="query" />
<tr ng-repeat="word in words | filter: myFilter">

在控制器中：

$scope.myFilter = function (word) {
    if ($scope.query === '') return true;
    var reg = RegExp("^" + $scope.query + "$");
    return reg.test(word.title);
};

Answer 4

我会创建一个新的过滤器。这是你想要的吗？

HTML

<div ng-controller="MyCtrl">
     {{words | exactMatch:'all'}} !
</div>

的JavaScript

var myApp = angular.module('myApp',[]);

myApp.filter('exactMatch', function() {
    return function(words, pattern) {
        var result = [];
        words.forEach(function (word) {
            if (word.title === pattern) {
                result.push(word);
            }
        });                
        return result;
    }
});

function MyCtrl($scope) {
    $scope.words = [
        {title: "ball", other: 1},
        {title: "wall", other: 2},
        {title: "all", other: 3},
        {title: "alloy", other: 4},
        {title: "all", other: 5},
    ];
}

JsFiddle：jsfiddle
有关自定义过滤器的详细信息：filters，creating custom filters and using filters

如果你想在Javascript而不是html中使用过滤器，你应该看看这里：jsfiddle

Answer 5

我创建了自己的过滤器。

<select 
        ng-model="selection.neType" 
        ng-options="option.NE_TYPE_ID as option.NAME for option in networkElementTypes">
            <option value="">Todos</option>
    </select>

<select 
        ng-model="selection.neTypeVendor" 
        ng-options="option.VENDOR_TYPE_ID as option.NAME for option in networkElementTypeVendors | exactMatch: {FK_NE_TYPE_ID: selection.neType}">
                <option value="">All</option>
            </select>

    app.filter('exactMatch', function() {
        return function(elements, pattern) {    

            var result = [];        
            var fieldSearch = Object.keys(pattern)[0];

            elements.forEach(function (element) {  

                if (element[fieldSearch] == pattern[fieldSearch]) {
                    result.push(element);
                }
            });          

            return result;
        }
    });

Answer 6

angular-filter是一个有用的过滤器库。

其中一个过滤器是完全匹配的where filter。

角度精确过滤器

6 个答案:

更新