Javascript 如何在angularJS中过滤多个值(或操作)
我想在angular中使用Javascript 如何在angularJS中过滤多个值(或操作),javascript,angularjs,angularjs-ng-repeat,Javascript,Angularjs,Angularjs Ng Repeat,我想在angular中使用过滤器,并想过滤多个值,如果它有一个值,那么应该显示它 例如,我有以下结构: 一个对象movie,它具有属性genres,我想过滤动作和喜剧 我知道我可以做过滤:({genres:'Action'}|{genres:'committee'}),但是如果我想动态过滤它,该怎么办呢。例如,filter:variableX 当我有一个必须过滤的类型数组时,如何在$scope中设置variableX 我可以将它构造为一个字符串,然后执行一个eval(),但我不想使用eval()
过滤器
,并想过滤多个值,如果它有一个值,那么应该显示它
例如,我有以下结构:
一个对象movie
,它具有属性genres
,我想过滤动作和喜剧
我知道我可以做过滤:({genres:'Action'}|{genres:'committee'})
,但是如果我想动态过滤它,该怎么办呢。例如,filter:variableX
当我有一个必须过滤的类型数组时,如何在$scope
中设置variableX
我可以将它构造为一个字符串,然后执行一个eval()
,但我不想使用eval()…我只想创建一个自定义过滤器。他们没有那么难
angular.module('myFilters', []).
filter('bygenre', function() {
return function(movies,genres) {
var out = [];
// Filter logic here, adding matches to the out var.
return out;
}
});
模板:
电影
行动
家庭
{{genrefilters.action}::{{genrefilters.family}
- {{movie.title}:{{{movie.genre}
编辑以下是链接:
更新:这里有一个我的建议的精确演示。您可以使用控制器功能进行过滤
function MoviesCtrl($scope) {
$scope.movies = [{name:'Shrek', genre:'Comedy'},
{name:'Die Hard', genre:'Action'},
{name:'The Godfather', genre:'Drama'}];
$scope.selectedGenres = ['Action','Drama'];
$scope.filterByGenres = function(movie) {
return ($scope.selectedGenres.indexOf(movie.genre) !== -1);
};
}
HTML:
-
{{movie.name}{{movie.genre}
在这里创建自定义过滤器可能有些过分,如果您有如下倍数值,您可以传入一个自定义比较器:
$scope.selectedGenres = "Action, Drama";
$scope.containsComparator = function(expected, actual){
return actual.indexOf(expected) > -1;
};
然后在过滤器中:
filter:{name:selectedGenres}:containsComparator
这是自定义筛选器的实现,它将使用值数组对数据进行筛选。它将支持具有数组和单个值键的多个键对象。正如GularJS API中提到的,支持单值多键过滤器,但下面的自定义过滤器将支持与angularJS相同的功能,还支持值数组以及数组和单值键的组合。请查找下面的代码片段
myApp.filter('filterMultiple',['$filter',function ($filter) {
return function (items, keyObj) {
var filterObj = {
data:items,
filteredData:[],
applyFilter : function(obj,key){
var fData = [];
if (this.filteredData.length == 0)
this.filteredData = this.data;
if (obj){
var fObj = {};
if (!angular.isArray(obj)){
fObj[key] = obj;
fData = fData.concat($filter('filter')(this.filteredData,fObj));
} else if (angular.isArray(obj)){
if (obj.length > 0){
for (var i=0;i<obj.length;i++){
if (angular.isDefined(obj[i])){
fObj[key] = obj[i];
fData = fData.concat($filter('filter')(this.filteredData,fObj));
}
}
}
}
if (fData.length > 0){
this.filteredData = fData;
}
}
}
};
if (keyObj){
angular.forEach(keyObj,function(obj,key){
filterObj.applyFilter(obj,key);
});
}
return filterObj.filteredData;
}
}]);
下面是一个fiddle示例,它实现了上面的“filterMutiple”自定义过滤器。
最好的答案是:
filter:({genres: 'Action', genres: 'Comedy'}
我相信这就是你想要的:
<div>{{ (collection | fitler1:args) + (collection | filter2:args) }}</div>
{(集合| fitler1:args)+(集合|过滤器2:args)}
您可以使用
JS:
arrayOfObjectswithKeys | filterMultiple:{key1:['value1','value2','value3',...etc],key2:'value4',key3:[value5,value6,...etc]}
$scope.users = [
{ first_name: 'Sharon', last_name: 'Melendez' },
{ first_name: 'Edmundo', last_name: 'Hepler' },
{ first_name: 'Marsha', last_name: 'Letourneau' }
];
<input ng-model="search" placeholder="search by full name"/>
<th ng-repeat="user in users | searchField: 'first_name': 'last_name' | filter: search">
{{ user.first_name }} {{ user.last_name }}
</th>
<!-- so now you can search by full name -->
App.filter('searchMovies', function() {
return function (items, letter) {
var resulsts = [];
var itemMatch = new RegExp(letter, 'i');
for (var i = 0; i < items.length; i++) {
var item = items[i];
if ( itemMatch.test(item.name) || itemMatch.test(item.genre)) {
results.push(item);
}
}
return results;
};
});
HTML:
arrayOfObjectswithKeys | filterMultiple:{key1:['value1','value2','value3',...etc],key2:'value4',key3:[value5,value6,...etc]}
$scope.users = [
{ first_name: 'Sharon', last_name: 'Melendez' },
{ first_name: 'Edmundo', last_name: 'Hepler' },
{ first_name: 'Marsha', last_name: 'Letourneau' }
];
<input ng-model="search" placeholder="search by full name"/>
<th ng-repeat="user in users | searchField: 'first_name': 'last_name' | filter: search">
{{ user.first_name }} {{ user.last_name }}
</th>
<!-- so now you can search by full name -->
App.filter('searchMovies', function() {
return function (items, letter) {
var resulsts = [];
var itemMatch = new RegExp(letter, 'i');
for (var i = 0; i < items.length; i++) {
var item = items[i];
if ( itemMatch.test(item.name) || itemMatch.test(item.genre)) {
results.push(item);
}
}
return results;
};
});
{{user.first_name}{{user.last_name}}
如果要对对象数组进行筛选,则可以
filter:({genres:'Action',key:value}.
单个属性将通过为该属性指定的特定筛选器进行筛选
但是,如果您想按单个属性进行过滤,并对所有属性进行全局过滤,那么您可以这样做。
我写这篇文章是为了字符串和功能(我知道这不是问题,但我在这里搜索了它),也许它可以扩展
String.prototype.contains = function(str) {
return this.indexOf(str) != -1;
};
String.prototype.containsAll = function(strArray) {
for (var i = 0; i < strArray.length; i++) {
if (!this.contains(strArray[i])) {
return false;
}
}
return true;
}
app.filter('filterMultiple', function() {
return function(items, filterDict) {
return items.filter(function(item) {
for (filterKey in filterDict) {
if (filterDict[filterKey] instanceof Array) {
if (!item[filterKey].containsAll(filterDict[filterKey])) {
return false;
}
} else {
if (!item[filterKey].contains(filterDict[filterKey])) {
return false;
}
}
}
return true;
});
};
});
String.prototype.contains=函数(str){
返回这个。indexOf(str)!=-1;
};
String.prototype.containsAll=函数(strArray){
对于(变量i=0;i
用法:
<li ng-repeat="x in array | filterMultiple:{key1: value1, key2:[value21, value22]}">{{x.name}}</li>
角度或过滤模块
$filter('orFilter')([{..},{..}…],{arg1,arg2,…},false)
下面是链接:假设您有两个数组,一个用于电影,一个用于流派
只需将筛选器用作:筛选器:{genres:genres.type}
这里,作为数组和类型的类型对类型有价值我的解决方案
ng-repeat="movie in movies | filter: {'Action'} + filter: {'Comedy}"
我花了一些时间在上面,多亏了@chrismarx,我看到angular的默认filterFilter
允许您传递自己的比较器。以下是多个值的编辑比较器:
function hasCustomToString(obj) {
return angular.isFunction(obj.toString) && obj.toString !== Object.prototype.toString;
}
var comparator = function (actual, expected) {
if (angular.isUndefined(actual)) {
// No substring matching against `undefined`
return false;
}
if ((actual === null) || (expected === null)) {
// No substring matching against `null`; only match against `null`
return actual === expected;
}
// I edited this to check if not array
if ((angular.isObject(expected) && !angular.isArray(expected)) || (angular.isObject(actual) && !hasCustomToString(actual))) {
// Should not compare primitives against objects, unless they have custom `toString` method
return false;
}
// This is where magic happens
actual = angular.lowercase('' + actual);
if (angular.isArray(expected)) {
var match = false;
expected.forEach(function (e) {
e = angular.lowercase('' + e);
if (actual.indexOf(e) !== -1) {
match = true;
}
});
return match;
} else {
expected = angular.lowercase('' + expected);
return actual.indexOf(expected) !== -1;
}
};
如果我们想为干式过滤器定制:
angular.module('myApp')
.filter('filterWithOr', function ($filter) {
var comparator = function (actual, expected) {
if (angular.isUndefined(actual)) {
// No substring matching against `undefined`
return false;
}
if ((actual === null) || (expected === null)) {
// No substring matching against `null`; only match against `null`
return actual === expected;
}
if ((angular.isObject(expected) && !angular.isArray(expected)) || (angular.isObject(actual) && !hasCustomToString(actual))) {
// Should not compare primitives against objects, unless they have custom `toString` method
return false;
}
console.log('ACTUAL EXPECTED')
console.log(actual)
console.log(expected)
actual = angular.lowercase('' + actual);
if (angular.isArray(expected)) {
var match = false;
expected.forEach(function (e) {
console.log('forEach')
console.log(e)
e = angular.lowercase('' + e);
if (actual.indexOf(e) !== -1) {
match = true;
}
});
return match;
} else {
expected = angular.lowercase('' + expected);
return actual.indexOf(expected) !== -1;
}
};
return function (array, expression) {
return $filter('filter')(array, expression, comparator);
};
});
然后我们可以在任何地方使用它:
$scope.list=[
{name:'Jack Bauer'},
{name:'Chuck Norris'},
{name:'Superman'},
{name:'Batman'},
{name:'Spiderman'},
{name:'Hulk'}
];
<ul>
<li ng-repeat="item in list | filterWithOr:{name:['Jack','Chuck']}">
{{item.name}}
</li>
</ul>
$scope.list=[
{姓名:'Jack Bauer'},
{姓名:'Chuck Norris'},
{姓名:'超人'},
{姓名:'蝙蝠侠'},
{name:'Spiderman'},
{name:'Hulk'}
];
-
{{item.name}
最后是一个例子
注意:预期的数组应该只包含简单的对象,如字符串、数字等。请尝试此操作
var m = angular.module('yourModuleName');
m.filter('advancefilter', ['$filter', function($filter){
return function(data, text){
var textArr = text.split(' ');
angular.forEach(textArr, function(test){
if(test){
data = $filter('filter')(data, test);
}
});
return data;
}
}]);
我也遇到过类似的情况。编写自定义过滤器对我很有用。希望这对我有所帮助
JS:
arrayOfObjectswithKeys | filterMultiple:{key1:['value1','value2','value3',...etc],key2:'value4',key3:[value5,value6,...etc]}
$scope.users = [
{ first_name: 'Sharon', last_name: 'Melendez' },
{ first_name: 'Edmundo', last_name: 'Hepler' },
{ first_name: 'Marsha', last_name: 'Letourneau' }
];
<input ng-model="search" placeholder="search by full name"/>
<th ng-repeat="user in users | searchField: 'first_name': 'last_name' | filter: search">
{{ user.first_name }} {{ user.last_name }}
</th>
<!-- so now you can search by full name -->
App.filter('searchMovies', function() {
return function (items, letter) {
var resulsts = [];
var itemMatch = new RegExp(letter, 'i');
for (var i = 0; i < items.length; i++) {
var item = items[i];
if ( itemMatch.test(item.name) || itemMatch.test(item.genre)) {
results.push(item);
}
}
return results;
};
});
App.filter('searchMovies',function(){
返回函数(项目、字母){
var results=[];
var itemMatch=new RegExp(字母“i”);
对于(变量i=0;i
HTML:
<div ng-controller="MoviesCtrl">
<ul>
<li ng-repeat="movie in movies | searchMovies:filterByGenres">
{{ movie.name }} {{ movie.genre }}
</li>
</ul>
</div>
-
{{movie.name}{{movie.genre}
如果情况允许,您也可以使用ngIf
:
<div ng-repeat="p in [
{ name: 'Justin' },
{ name: 'Jimi' },
{ name: 'Bob' }
]" ng-if="['Jimi', 'Bob'].indexOf(e.name) > -1">
{{ p.name }} is cool
</div>
{{p.name}}很酷
以下是我如何为表创建筛选器和指令的示例
指令获取列表(数据)并使用过滤器创建表
<div ng-app="autoDrops" ng-controller="HomeController">
<div class="row">
<div class="col-md-12">
<h1>{{title}}</h1>
<ng-Multiselect array-List="datas"></ng-Multiselect>
</div>
</div>
</div>