1.切换工作目录
git checkout step-4 #切换分支,切换到第4步
npm start #启动项目
2.代码
app/index.html
Search: <input ng-model="query">
Sort by:
<select ng-model="orderProp">
<option value="name">Alphabetical</option>
<option value="age">Newest</option>
</select><ul class="phones">
<li ng-repeat="phone in phones | filter:query | orderBy:orderProp">
{{phone.name}}
<p>{{phone.snippet}}</p>
</li>
</ul>
app/controllers.js
var phonecatApp = angular.module(‘phonecatApp‘, []);phonecatApp.controller(‘PhoneListCtrl‘, function($scope) {
$scope.phones = [
{‘name‘: ‘Nexus S‘,
‘snippet‘: ‘Fast just got faster with Nexus S.‘,
‘age‘: 1},
{‘name‘: ‘Motorola XOOM? with Wi-Fi‘,
‘snippet‘: ‘The Next, Next Generation tablet.‘,
‘age‘: 2},
{‘name‘: ‘MOTOROLA XOOM?‘,
‘snippet‘: ‘The Next, Next Generation tablet.‘,
‘age‘: 3}
];$scope.orderProp = ‘age‘;
});
3.效果
按字母排序:
按时间排序:
很明显,相较于step-3,step-4新增加了排序功能
4.原理说明
首先,添加了<select> 标签:
<select ng-model="orderProp">
<option value="name">Alphabetical</option>
<option value="age">Newest</option>
</select>
其次,在filter中添加了orderBy:
<li ng-repeat="phone in phones | filter:query | orderBy:orderProp">
{{phone.name}}
<p>{{phone.snippet}}</p>
</li>
所以,根据angularjs的思想,一是model改变(可能是用户手动选择下拉框导致的),那么根据数据绑定原则(data-binding),view也将适时进行改变.
orderBy api:https://docs.angularjs.org/api/ng/filter/orderBy
orderBy Usage(用法)
In HTML Template Binding(在HTML中的用法)
{{ orderBy_expression | orderBy : expression : reverse}}In JavaScript(在JS中的用法)
$filter(‘orderBy‘)(array, expression, reverse)上面的例子是在HTML中用的,默认string类型的数据是按照字母表中数据排序的,而number数字类型的数据是按照数字大小进行排序的.
如果想要倒序,那么可以在上面的option value=‘-name‘,加上一个‘-‘即可.
5.测试
[email protected]-pc:~/develop/angular-phonecat$ npm run protractor> [email protected]0.0.0 preprotractor /home/amosli/develop/angular-phonecat
> npm run update-webdriver> [email protected]0.0.0 preupdate-webdriver /home/amosli/develop/angular-phonecat
> npm install> [email protected]0.0.0 postinstall /home/amosli/develop/angular-phonecat
> bower install> [email protected]0.0.0 update-webdriver /home/amosli/develop/angular-phonecat
> webdriver-manager updateselenium standalone is up to date.
chromedriver is up to date.> [email protected]0.0.0 protractor /home/amosli/develop/angular-phonecat
> protractor test/protractor-conf.js------------------------------------
PID: 5265 (capability: chrome #1)
------------------------------------Using ChromeDriver directly...
..Finished in 5.033 seconds
2 tests, 5 assertions, 0 failures
这里执行的是端到端的测试,测试代码如下:
angular-phonecat/test/e2e/scenarios.js
[email protected]:~/develop/angular-phonecat/test/e2e$ cat scenarios.js
‘use strict‘;/* http://docs.angularjs.org/guide/dev_guide.e2e-testing */
describe(‘PhoneCat App‘, function() {
describe(‘Phone list view‘, function() {
beforeEach(function() {
browser.get(‘app/index.html‘);
});it(‘should filter the phone list as user types into the search box‘, function() {
var phoneList = element.all(by.repeater(‘phone in phones‘));
var query = element(by.model(‘query‘));expect(phoneList.count()).toBe(3);
query.sendKeys(‘nexus‘);
expect(phoneList.count()).toBe(1);query.clear();
query.sendKeys(‘motorola‘);
expect(phoneList.count()).toBe(2);
});it(‘should be possible to control phone order via the drop down select box‘, function() {
var phoneNameColumn = element.all(by.repeater(‘phone in phones‘).column(‘{{phone.name}}‘));
var query = element(by.model(‘query‘));function getNames() {
return phoneNameColumn.map(function(elm) {
return elm.getText();
});
}query.sendKeys(‘tablet‘); //let‘s narrow the dataset to make the test assertions shorter
expect(getNames()).toEqual([
"Motorola XOOM\u2122 with Wi-Fi",
"MOTOROLA XOOM\u2122"
]);element(by.model(‘orderProp‘)).findElement(by.css(‘option[value="name"]‘)).click();
expect(getNames()).toEqual([
"MOTOROLA XOOM\u2122",
"Motorola XOOM\u2122 with Wi-Fi"
]);
});
});
});
AngularJS学习--- AngularJS中数据双向绑定(two-way data-binding) orderBy
step4