Javascript 如何在AngularJs中使用ng repeat过滤(键、值)?
我正在尝试做一些类似的事情:Javascript 如何在AngularJs中使用ng repeat过滤(键、值)?,javascript,angularjs,frameworks,ng-repeat,angular-filters,Javascript,Angularjs,Frameworks,Ng Repeat,Angular Filters,我正在尝试做一些类似的事情: <div ng-controller="TestCtrl"> <div ng-repeat="(k,v) in items | filter:hasSecurityId"> {{k}} {{v.pos}} </div> </div> 但不知怎么的,它向我展示了所有的物品。如何筛选(键、值)?Angular只能从Angular的API应用于数组,而不能应用于对象- “从数组中选择项的子集
<div ng-controller="TestCtrl">
<div ng-repeat="(k,v) in items | filter:hasSecurityId">
{{k}} {{v.pos}}
</div>
</div>
但不知怎么的,它向我展示了所有的物品。如何筛选(键、值)?Angular只能从Angular的API应用于数组,而不能应用于对象-
“从数组中选择项的子集,并将其作为新数组返回。”
这里有两个选项:1) 将
$scope.items
移动到数组或-2) 预过滤
ng repeat
项,如下所示:
<div ng-repeat="(k,v) in filterSecId(items)">
{{k}} {{v.pos}}
</div>
<div ng-controller="TestCtrl">
<div ng-repeat="(k,v) in items | filter:{secId: '!!'}">
{{k}} {{v.pos}}
</div>
</div>
<div>
<input ng-model="search" />
</div>
<div ng-repeat="item in test | objectFilter : search">
{{item | json}}
</div>
jsfiddle:我的解决方案是创建自定义过滤器并使用它:
app.filter('with', function() {
return function(items, field) {
var result = {};
angular.forEach(items, function(value, key) {
if (!value.hasOwnProperty(field)) {
result[key] = value;
}
});
return result;
};
});
和html格式:
<div ng-repeat="(k,v) in items | with:'secId'">
{{k}} {{v.pos}}
</div>
{{k}{{v.pos}}
或直接使用
ng-show="v.hasOwnProperty('secId')"
请参见此处的更新解决方案:
您可以简单地使用模块,然后甚至可以通过嵌套属性进行筛选。请参阅:
两个示例:
JS:
angular.module('app', ['angular.filter'])
.controller('MainCtrl', function($scope) {
//your example data
$scope.items = {
'A2F0C7':{ secId:'12345', pos:'a20' },
'C8B3D1':{ pos:'b10' }
};
//more advantage example
$scope.nestedItems = {
'A2F0C7':{
details: { secId:'12345', pos:'a20' }
},
'C8B3D1':{
details: { pos:'a20' }
},
'F5B3R1': { secId:'12345', pos:'a20' }
};
});
<b>Example1:</b>
<p ng-repeat="item in items | toArray: true | pick: 'secId'">
{{ item.$key }}, {{ item }}
</p>
<b>Example2:</b>
<p ng-repeat="item in nestedItems | toArray: true | pick: 'secId || details.secId' ">
{{ item.$key }}, {{ item }}
</p>
<input ng-model="customerNameFilter" />
<div ng-repeat="(key, value) in filter(customers, 'customerName', customerNameFilter" >
<p>Number: {{value.customerNo}}</p>
<p>Name: {{value.customerName}}</p>
</div>
$scope.filter = function(object, field, filter) {
if (!object) return {};
if (!filter) return object;
var filteredObject = {};
Object.keys(object).forEach(function(key) {
if (object[key][field] === filter) {
filteredObject[key] = object[key];
}
});
return filteredObject;
};
HTML:
angular.module('app', ['angular.filter'])
.controller('MainCtrl', function($scope) {
//your example data
$scope.items = {
'A2F0C7':{ secId:'12345', pos:'a20' },
'C8B3D1':{ pos:'b10' }
};
//more advantage example
$scope.nestedItems = {
'A2F0C7':{
details: { secId:'12345', pos:'a20' }
},
'C8B3D1':{
details: { pos:'a20' }
},
'F5B3R1': { secId:'12345', pos:'a20' }
};
});
<b>Example1:</b>
<p ng-repeat="item in items | toArray: true | pick: 'secId'">
{{ item.$key }}, {{ item }}
</p>
<b>Example2:</b>
<p ng-repeat="item in nestedItems | toArray: true | pick: 'secId || details.secId' ">
{{ item.$key }}, {{ item }}
</p>
<input ng-model="customerNameFilter" />
<div ng-repeat="(key, value) in filter(customers, 'customerName', customerNameFilter" >
<p>Number: {{value.customerNo}}</p>
<p>Name: {{value.customerName}}</p>
</div>
$scope.filter = function(object, field, filter) {
if (!object) return {};
if (!filter) return object;
var filteredObject = {};
Object.keys(object).forEach(function(key) {
if (object[key][field] === filter) {
filteredObject[key] = object[key];
}
});
return filteredObject;
};
示例1:
{{item.$key},{{item}
例2:
{{item.$key},{{item}
如果符合以下条件,您还可以将ng repeat
与ng一起使用:
<div ng-repeat="(key, value) in order" ng-if="value > 0">
有点晚了,但我找了一个类似的过滤器,最后使用了如下内容:
<div ng-repeat="(k,v) in filterSecId(items)">
{{k}} {{v.pos}}
</div>
<div ng-controller="TestCtrl">
<div ng-repeat="(k,v) in items | filter:{secId: '!!'}">
{{k}} {{v.pos}}
</div>
</div>
<div>
<input ng-model="search" />
</div>
<div ng-repeat="item in test | objectFilter : search">
{{item | json}}
</div>
{{k}{{v.pos}}
我制作了一个通用过滤器,我已经在多个项目中使用过:
- object=需要过滤的对象
- field=我们要筛选的对象中的字段
- filter=需要与字段匹配的筛选器的值
HTML:
angular.module('app', ['angular.filter'])
.controller('MainCtrl', function($scope) {
//your example data
$scope.items = {
'A2F0C7':{ secId:'12345', pos:'a20' },
'C8B3D1':{ pos:'b10' }
};
//more advantage example
$scope.nestedItems = {
'A2F0C7':{
details: { secId:'12345', pos:'a20' }
},
'C8B3D1':{
details: { pos:'a20' }
},
'F5B3R1': { secId:'12345', pos:'a20' }
};
});
<b>Example1:</b>
<p ng-repeat="item in items | toArray: true | pick: 'secId'">
{{ item.$key }}, {{ item }}
</p>
<b>Example2:</b>
<p ng-repeat="item in nestedItems | toArray: true | pick: 'secId || details.secId' ">
{{ item.$key }}, {{ item }}
</p>
<input ng-model="customerNameFilter" />
<div ng-repeat="(key, value) in filter(customers, 'customerName', customerNameFilter" >
<p>Number: {{value.customerNo}}</p>
<p>Name: {{value.customerName}}</p>
</div>
$scope.filter = function(object, field, filter) {
if (!object) return {};
if (!filter) return object;
var filteredObject = {};
Object.keys(object).forEach(function(key) {
if (object[key][field] === filter) {
filteredObject[key] = object[key];
}
});
return filteredObject;
};
尽管这个问题已经很老了,我还是想和angular 1开发人员分享我的解决方案。关键是要重用原始的角度过滤器,但要以数组的形式透明地传递任何对象
app.filter('objectFilter', function ($filter) {
return function (items, searchToken) {
// use the original input
var subject = items;
if (typeof(items) == 'object' && !Array.isArray(items)) {
// or use a wrapper array, if we have an object
subject = [];
for (var i in items) {
subject.push(items[i]);
}
}
// finally, apply the original angular filter
return $filter('filter')(subject, searchToken);
}
});
像这样使用它:
<div ng-repeat="(k,v) in filterSecId(items)">
{{k}} {{v.pos}}
</div>
<div ng-controller="TestCtrl">
<div ng-repeat="(k,v) in items | filter:{secId: '!!'}">
{{k}} {{v.pos}}
</div>
</div>
<div>
<input ng-model="search" />
</div>
<div ng-repeat="item in test | objectFilter : search">
{{item | json}}
</div>
{{item | json}}
下面是一个请提供一些关于项目的示例数据。或者给我们一把小提琴;)这不是你创建过滤器的方式,正如Robin所说,请举个例子。我已经给出了一个完整的例子,我知道如何使用过滤器。我只是在问“如何使用带(键,值)的筛选器”。索引和计数应该在该范围内可用iircOne需要小心使用此方法以避免无限(摘要)循环。见和。Summary by:简而言之,使用函数返回ng repeat中的集合是一种反模式。最好将集合分配给scope属性,并循环该属性。有用的注释。这让我很吃惊;我希望能够过滤任何可过滤的内容。谢谢。:)注意:这是一个性能反模式。Angular 1.3现在有无状态筛选器(),所以您一定要为此创建筛选器。@不要发布非免费的链接!为什么不在重复元素上添加ng if呢?但是,它会循环n*n次。您应该披露angular.filter
不是核心angular模块,您是它的作者。看起来toArray
过滤器不再存在了。由于过滤器
过滤器仍然不允许对象,是否有替换?谢谢。。我用了这个,但是用了ng if
来代替,你是怎么做到的?当我对ng重复对象使用过滤器时,我会得到一个错误,这是基于Angular documentation.cleer的预期结果。这节省了很多时间。