使用带有 AngularJS 的复选框过滤数组
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【中文标题】使用带有 AngularJS 的复选框过滤数组【英文标题】:Filter Array Using Checkboxes with AngularJS 【发布时间】:2014-01-30 06:00:56 【问题描述】:我有以下代码,我试图通过选中玩家裤子尺寸的复选框来过滤数组中的玩家。
我知道我在转发器中有数据数组,然后在数据数组元素(两个不同的 div)之外的元素中进行过滤输入,这可能是导致断开连接的原因吗?因为我注意到当我将复选框添加到转发器元素时,当我单击复选框时,我确实得到了某种形式的反馈数组。
绑定一个搜索输入框很容易实现,但是我花了太多时间来获取这个简单的复选框来过滤数据。
因此,我现在向 Angular 社区寻求有关使用复选框进行过滤的一些帮助,因为文档并没有很好地涵盖这个主题。
这里是小提琴:http://jsfiddle.net/rzgWr/1/
<div ng-controller="MyCtrl">
<div>
<div ng-repeat="pants in players | groupBy:'pants'">
<b><input type="checkbox" ng-model="query"/>pants</b>
<span>((players | filter:pants).length)</span>
</div>
<div>
<ul>
<li ng-repeat="player in players | filter:query">
<p><b>player.name</b></p>
<p>player.shirt player.pants, player.shoes</p>
</li>
</ul>
</div>
</div>
function MyCtrl($scope, filterFilter)
$scope.players = [
name: 'Bruce Wayne', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Wayne Gretzky', shirt: 'XL', pants: '38', shoes: '10',
name: 'Michael Jordan', shirt: 'M', pants: '32', shoes: '9',
name: 'Player Two', shirt: 'XXL', pants: '42', shoes: '12'
];
$scope.$watch('filtered', function (newValue)
if (angular.isArray(newValue))
console.log(newValue.length);
, true);
真诚感谢任何和所有帮助/建议。
谢谢。
【问题讨论】:
您的意思是当您搜索某些内容时,复选框旁边的绑定会更新? 【参考方案1】:编辑 2
根据 OP 的所有请求,这是最终状态。
http://jsfiddle.net/rzgWr/19/
编辑(OP添加了赏金)
根据你的赏金,这是你想要的吗?
http://jsfiddle.net/rzgWr/17/
这是你想要的吗?
http://jsfiddle.net/rzgWr/12/
模板
<div ng-controller="MyCtrl">
<div>
<div>
Search: <input name="company" type="text" class="search-input" ng-model="query"/>
</div>
<div ng-init="pantsGroup = (players | groupBy:'pants')">
<div ng-repeat="pants in pantsGroup" >
<b><input type="checkbox" ng-model="usePants[$index]"/>pants</b>
<span>((players | filter:pants).length)</span>
</div>
</div>
<div>
<ul>
<li ng-repeat="player in players | filter:query | filter:filterPants()">
<p><b>player.name</b></p>
<p>player.shirt player.pants, player.shoes</p>
</li>
</ul>
</div>
</div>
</div>
脚本
var myApp = angular.module('myApp',[]);
function MyCtrl($scope, filterFilter)
$scope.usePants = [];
$scope.filterPants = function ()
return function (p)
for (var i in $scope.usePants)
return (p.pants == $scope.pantsGroup[i] && $scope.usePants[i]);
;
;
$scope.players = [
name: 'Bruce Wayne', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Wayne Gretzky', shirt: 'XL', pants: '38', shoes: '10',
name: 'Michael Jordan', shirt: 'M', pants: '32', shoes: '9',
name: 'Rodman', shirt: 'XXL', pants: '42', shoes: '11',
name: 'Jake Smitz', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Will Will', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Youasdf Oukls', shirt: 'XL', pants: '38', shoes: '10',
name: 'Sam Sneed', shirt: 'XL', pants: '38', shoes: '10',
name: 'Bill Waxy', shirt: 'M', pants: '32', shoes: '9',
name: 'Javier Xavior', shirt: 'M', pants: '32', shoes: '9',
name: 'Bill Knight', shirt: 'M', pants: '32', shoes: '9',
name: 'One More', shirt: 'M', pants: '32', shoes: '9',
name: 'Player One', shirt: 'XXL', pants: '42', shoes: '11',
name: 'Space Cadet', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Player Two', shirt: 'XXL', pants: '42', shoes: '12'
];
$scope.$watch('filtered', function (newValue)
if (angular.isArray(newValue))
console.log(newValue.length);
, true);
myApp.filter('count', function()
return function(collection, key)
var out = "test";
for (var i = 0; i < collection.length; i++)
//console.log(collection[i].pants);
//var out = myApp.filter('filter')(collection[i].pants, "42", true);
return out;
);
var uniqueItems = function (data, key)
var result = new Array();
for (var i = 0; i < data.length; i++)
var value = data[i][key];
if (result.indexOf(value) == -1)
result.push(value);
return result;
;
myApp.filter('groupBy',
function ()
return function (collection, key)
if (collection === null) return;
return uniqueItems(collection, key);
;
);
【讨论】:
Words:当我现在使用来自服务器的数据尝试此功能时,过滤不再起作用,因为 ng-init 正在运行,无法在动态数据上运行表达式。关于我可以使用什么来代替 ng-init 的任何想法?谢谢。 是的,我使用了它,所以我不必将$filter
服务注入控制器。这就是您需要做的所有事情:jsfiddle.net/rzgWr/16
我想任何一种解决方案都可以,只要级联过滤缩小数组数据。理想情况下,我希望根据剩余数据更新过滤器。因此,例如,如果鞋子:M 被过滤,并且只有小号和中号的裤子尺寸保留在过滤后的数据中,那么只有小号和中号的裤子过滤器可见并可用于进一步过滤。这有帮助吗?
是的,我只是重写了那段代码。似乎工作。 jsfiddle.net/rzgWr/19
你所做的简直太棒了!您为这个 Angular 主题的论坛增加了巨大的价值,我非常高兴地奖励您! :)【参考方案2】:
完全优化的 js 代码
var myApp = angular.module('myApp',[]);
var selected;
var uniqueItems = function (data, key)
var result = [];
for (var i = 0; i < data.length; i++)
var value = data[i][key];
if (result.indexOf(value) == -1)
result.push(value);
return result;
;
var fliter = function(totalData,selectedData,equalData)
var filterAfter = [];
selected = false;
for (var j in totalData)
var p = totalData[j];
for (var i in selectedData)
if (selectedData[i])
selected = true;
if (i == p[equalData])
filterAfter.push(p);
break;
if (!selected)
filterAfter = totalData;
return filterAfter;
function MyCtrl($scope, filterFilter)
$scope.usePants = ;
$scope.useShirts = ;
$scope.useShoes = ;
$scope.players = [
name: 'Bruce Wayne', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Wayne Gretzky', shirt: 'XL', pants: '38', shoes: '10',
name: 'Michael Jordan', shirt: 'M', pants: '32', shoes: '9',
name: 'Rodman', shirt: 'XXL', pants: '42', shoes: '11',
name: 'Jake Smitz', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Will Will', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Youasdf Oukls', shirt: 'XL', pants: '38', shoes: '10',
name: 'Sam Sneed', shirt: 'XL', pants: '38', shoes: '10',
name: 'Bill Waxy', shirt: 'M', pants: '32', shoes: '9',
name: 'Javier Xavior', shirt: 'M', pants: '32', shoes: '9',
name: 'Bill Knight', shirt: 'M', pants: '32', shoes: '9',
name: 'One More', shirt: 'M', pants: '32', shoes: '9',
name: 'Player One', shirt: 'XXL', pants: '42', shoes: '11',
name: 'Space Cadet', shirt: 'XXL', pants: '42', shoes: '12',
name: 'Player Two', shirt: 'XXL', pants: '42', shoes: '12'
];
// Watch the pants that are selected
$scope.$watch(function ()
return
players: $scope.players,
usePants: $scope.usePants,
useShirts: $scope.useShirts,
useShoes: $scope.useShoes
, function (value)
$scope.count = function (prop, value)
return function (el)
return el[prop] == value;
;
;
$scope.pantsGroup = uniqueItems($scope.players, 'pants');
$scope.shirtsGroup = uniqueItems($scope.players, 'shirt');
$scope.shoesGroup = uniqueItems($scope.players, 'shoes');
var fliterType = [selected : $scope.usePants,fliter : 'pants',selected : $scope.useShirts,fliter : 'shirt',selected : $scope.useShoes,fliter : 'shoes'];
var startFliter = $scope.players;
for(var i in fliterType)
var startFliter = fliter(startFliter,fliterType[i].selected,fliterType[i].fliter);
$scope.filteredPlayers = startFliter;
, true);
【讨论】:
这是另一种编写上述过滤代码的方式 我正在使用您的代码来满足我的要求。唯一的区别是我想让未过滤的对象传递给 filterType 循环。在您的代码中,您传递了作为过滤对象的 startFilter,但我想传递未过滤的对象,因此每当用户检查多个选项时,代码都会显示所选对象的所有对象。你知道我需要做什么改变才能完成吗?我尝试了不同的解决方案,但它们破坏了代码。 如果您调试该选定值,您将得到答案。例如,输入“console.log($scope.usePants);”它为选中返回 42:true;如果您想取消选择该值,您确实需要像这样设置 '42:false';以上是关于使用带有 AngularJS 的复选框过滤数组的主要内容,如果未能解决你的问题,请参考以下文章
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