了解jQuery Deferred.pipe() [英] Understanding jQuery Deferred.pipe()

问题描述

我正在尝试在以下情况下实现jQuery Deferred.pipe()方法:

I am trying to implement the jQuery Deferred.pipe() method for the following scenario:

1. 通过$ .ajax()在数据库中添加用户
2. 获取响应，无论是否正确添加了用户.
3. 如果成功添加，请通过$ .ajax()从服务器获取所有用户列表
4. 通过jQuery模板显示列表

这是我尝试过的事情:

var addUserSuccess = function( data ) {
    if ( data.returnCode !== "success" ) {
        return $.Deferred().reject('Error saving user');
    }
    getUsers();
}

var addUser = function() {
    return $.ajax(url, {
        type: "POST",
        data: { username: 'test' },
        contentType: "application/json",
        dataType: "json"
    });
}

var displayUsers = function( data ) {
    $('#myTmpl').tmpl(data.d).appendTo('#myDiv');
}

var getUsers = function () {
    return $.ajax(url, {
        type: "GET",
        data: {},
        contentType: "application/json",
        dataType: "json"
    });
}

$.when(addUser()).pipe(addUserSuccess).then(displayUsers)

但这不起作用.我知道有些东西遗失或错误.有帮助吗?

But this does not work. I know there is something missing or wrong. Any help?

推荐答案

在addUsersSuccess中，您应该返回getUsers.这是一个简单的错字，您完全正确地掌握了主要思想，并按原样使用管道，这很不错:)

In addUsersSuccess, you should be returning getUsers. It's a simple typo, you got the main idea perfectly right and are using pipe as it should be and nicely :)

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