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exact filter in angular

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天命终不由人
天命终不由人 2020-11-29 12:10

In Angular, is there a way to modify the filter such that it only returns exact matches?

Example:

var words = [
    {   title: \"ball\"   },
    {
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6条回答
  • 离开以前
    2020-11-29 12:38

    I would create a new filter. Is this what you want?

    HTML

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

    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
    More information about custom filters: filters, creating custom filters and using filters

    If you want use filter in Javascript instead of html you should look here: jsfiddle

    0 讨论(0)
  • 半阙折子戏
    2020-11-29 12:41

    Try this :

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

var wordsFiltered = filter('filter')
( 
    words, 
    { 
        'title': 'all'
    },
    true
);
    0 讨论(0)
  • 迷失自我
    2020-11-29 12:42

    You can use Regex to achieve a simple implementation:

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

    In the controller:

    $scope.myFilter = function (word) {
    if ($scope.query === '') return true;
    var reg = RegExp("^" + $scope.query + "$");
    return reg.test(word.title);
};
    0 讨论(0)
  • 挽巷
    2020-11-29 12:54

    UPDATE

    Starting from AngularJS v.1.1.3 the exact filtering is 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

    Your question implies that you would want to match against multiple object properties so here's a filter that does that:

    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

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  • 北恋
    2020-11-29 12:56

    I created my own filter.

    <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;
        }
    });
    0 讨论(0)
  • 野的像风
    2020-11-29 13:05

    angular-filter is a useful library of filters.

    One of their filters is the where filter that does an exact match.

    0 讨论(0)
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