使用下拉菜单过滤 ng-repeat 而不复制下拉选项
Filter ng-repeat with dropdown without duplicating the dropdown options
同样,我可以在ng-repeat
中手动执行filter: { category : 'Popular'}
,我希望能够对下拉菜单执行相同的操作。
我能够使基础知识发挥作用。我有两个问题:我不希望下拉列表中的类别重复,我希望当我在下拉列表中 select "Popular" 时能够看到分类为 "Popular" 的所有内容.
这是我的HTML:
<div ng-controller="SuperCtrl" class="row">
<ul class="small-12 medium-12 columns">
<select ng-model="find" ng-options="entry.category for entry in parsedEntries"><option value="">Select Category</option></select>.
<li ng-repeat="entry in parsedEntries | filter: find">
<strong>{{ entry.title }} </strong><br>
{{ entry.description }}
</li>
</ul></div>
这是控制器:
app.controller('SuperCtrl', ['$scope', '$http', function($scope,$http) {
var url = 'https://spreadsheets.google.com/feeds/list/1lZWwacSVxTD_ciOsuNsrzeMTNAl0Dj8SOrbaMqPKM7U/od6/public/values?alt=json'
var parse = function(entry) {
var category = entry['gsx$category']['$t'];
var description = entry['gsx$description']['$t'];
var title = entry['gsx$title']['$t'];
return {
category: category,
description: description,
title: title
};
}
$http.get(url)
.success(function(response) {
var entries = response['feed']['entry'];
$scope.parsedEntries = [];
for (key in entries) {
var content = entries[key];
$scope.parsedEntries.push(parse(content));
}
});
}]);
让它按你想要的方式工作:
<select ng-model="find" ng-options="entry.category as entry.category for entry in parsedEntries | unique: 'category'">
unique
过滤器来自 angular-filter。它需要将 'angular.filter'
添加到您的模块依赖项中:
var app = angular.module('myApp', ['angular.filter']);
注意:这本身不是问题,但我从 <ul>
元素中取出了 <select>
元素。
只需将唯一类别放入名为 categories
的字符串数组中,对数组进行排序,然后使用 ng-options
:
显示它
<select ng-model="find" ng-options="category as category for category in categories"><option value="">Select Category</option></select>.
在您的解析函数之后将其附加到您的代码中,并删除您拥有的 $http.get
。这定义了一个 contains
函数并在对象返回的同时构建数组:
function contains(a, obj) {
for (var i = 0; i < a.length; i++) {
if (a[i] === obj) {
return true;
}
}
return false;
};
$http.get(url)
.success(function(response) {
var entries = response['feed']['entry'];
$scope.parsedEntries = [];
$scope.categories = [];
for (key in entries) {
var content = entries[key];
var obj = parse(content);
$scope.parsedEntries.push(obj);
if (!contains($scope.categories, obj.category))
{
$scope.categories.push(obj.category);
}
}
$scope.categories.sort();
})
同样,我可以在ng-repeat
中手动执行filter: { category : 'Popular'}
,我希望能够对下拉菜单执行相同的操作。
我能够使基础知识发挥作用。我有两个问题:我不希望下拉列表中的类别重复,我希望当我在下拉列表中 select "Popular" 时能够看到分类为 "Popular" 的所有内容.
这是我的HTML:
<div ng-controller="SuperCtrl" class="row">
<ul class="small-12 medium-12 columns">
<select ng-model="find" ng-options="entry.category for entry in parsedEntries"><option value="">Select Category</option></select>.
<li ng-repeat="entry in parsedEntries | filter: find">
<strong>{{ entry.title }} </strong><br>
{{ entry.description }}
</li>
</ul></div>
这是控制器:
app.controller('SuperCtrl', ['$scope', '$http', function($scope,$http) {
var url = 'https://spreadsheets.google.com/feeds/list/1lZWwacSVxTD_ciOsuNsrzeMTNAl0Dj8SOrbaMqPKM7U/od6/public/values?alt=json'
var parse = function(entry) {
var category = entry['gsx$category']['$t'];
var description = entry['gsx$description']['$t'];
var title = entry['gsx$title']['$t'];
return {
category: category,
description: description,
title: title
};
}
$http.get(url)
.success(function(response) {
var entries = response['feed']['entry'];
$scope.parsedEntries = [];
for (key in entries) {
var content = entries[key];
$scope.parsedEntries.push(parse(content));
}
});
}]);
让它按你想要的方式工作:
<select ng-model="find" ng-options="entry.category as entry.category for entry in parsedEntries | unique: 'category'">
unique
过滤器来自 angular-filter。它需要将 'angular.filter'
添加到您的模块依赖项中:
var app = angular.module('myApp', ['angular.filter']);
注意:这本身不是问题,但我从 <ul>
元素中取出了 <select>
元素。
只需将唯一类别放入名为 categories
的字符串数组中,对数组进行排序,然后使用 ng-options
:
<select ng-model="find" ng-options="category as category for category in categories"><option value="">Select Category</option></select>.
在您的解析函数之后将其附加到您的代码中,并删除您拥有的 $http.get
。这定义了一个 contains
函数并在对象返回的同时构建数组:
function contains(a, obj) {
for (var i = 0; i < a.length; i++) {
if (a[i] === obj) {
return true;
}
}
return false;
};
$http.get(url)
.success(function(response) {
var entries = response['feed']['entry'];
$scope.parsedEntries = [];
$scope.categories = [];
for (key in entries) {
var content = entries[key];
var obj = parse(content);
$scope.parsedEntries.push(obj);
if (!contains($scope.categories, obj.category))
{
$scope.categories.push(obj.category);
}
}
$scope.categories.sort();
})