parse.com参考错误:未定义用户

时间:2013-06-04 04:13:46

标签: javascript database templates parse-platform

我发现这个名为http://parse.com的网站非常酷。它是一个在线数据库(在许多其他事情中)。绝对检查一下。无论如何,我相信我距离弄清楚如何使用Parse.User,并在ejs模板中渲染对象电子邮件。我有它,所以我可以在parse.com上创建和存储用户 - 但我不认为我的模板正在识别我创建的“用户”变量。这是我的代码和错误:

的application.js

$(document).ready(function() {
    $("#signupform").submit(function(e) {  
        e.preventDefault();

        Parse.initialize("O3LAmHCCGmMWBRuPEt4cXWP5ChQMjeruyOkMN7m1", "AIyuUVnGYbyQrWaYns7TL3XpmjPb1FDeplQ76DgG");

        var user = new Parse.User(); 
        user.setUsername($('#username').val());
        user.setEmail($('#email').val());
        user.setPassword($('#pw').val());

        user.signUp();

        var html = new EJS({url: 'templates/usershow.ejs'}).render(user);
        var content = document.getElementById('listuser');
        content.innerHTML = content.innerHTML + html;
        $("#signupform").remove();   
    });
});

模板/ usershow.ejs

<li><%= user.getEmail() %></li>

的index.html

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>it IT</title>
  <link rel="stylesheet" type="text/css" href="application.css" />
  <script src="jquery.js"></script> 
  <script src="application.js"></script>
  <script type="text/javascript" src="ejs_production.js"></script>
  <script src="http://www.parsecdn.com/js/parse-1.2.7.min.js"></script>
  <!--[if lt IE 9]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
  <![endif]-->
</head>
<body>
    <h1>it IT</h1>
    <div id="signup">
        <form id="signupform">
            Username: <input type="text" name="username" id="username"><br>
            Password: <input type="password" name="pw" id="pw"><br>
            Email: <input type="text" name="email" id="email"><br>
            <input type="submit" value="sign up">
        </form>
    </div>
    <div id="signin"></div>
    <div id="showuser">
        <h2>Username - Email</h2>
        <ul id="listuser"></ul>
    </div>
</body>
</html>

我在firebug中获得的错误(在成功发布到parse.com数据库之后)是:

ReferenceError: user is not defined

有问题的行似乎是var html = new EJS({url: 'templates/usershow.ejs'}).render(user);行。我不确定渲染功能是否可以识别Parse.User对象?使用带有Parse.User的ejs可能有问题吗?

更新

在回复下面的评论时,我将代码更改为:

$(document).ready(function() {
    $("#signupform").submit(function(e) {  
        e.preventDefault();

        Parse.initialize("O3LAmHCCGmMWBRuPEt4cXWP5ChQMjeruyOkMN7m1", "AIyuUVnGYbyQrWaYns7TL3XpmjPb1FDeplQ76DgG");

        var user = new Parse.User(); 
        user.setUsername($('#username').val());
        user.setEmail($('#email').val());
        user.setPassword($('#pw').val());

        user.signUp(null, {
            success: function (user) {
                // Hooray! Let them use the app now.
                var html = new EJS({url: 'templates/usershow.ejs'}).render(user);
                var content = document.getElementById('listuser');
                content.innerHTML = content.innerHTML + html;
                $("#signupform").remove();   
            },
            error: function (user, error) {
                // Show the error message somewhere and let the user try again.
                //alert("Error: " + error.code + " " + error.message);
                console.log("Error: " + error.code + " " + error.message);                        
            }
        });
    });
});

虽然我认为这纠正了我的代码的问题......我仍然得到同样的错误,如上所述。

同样,我回到这一行var html = new EJS({url: 'templates/usershow.ejs'}).render(user);作为罪魁祸首......仅仅因为用户对象是Parse.User对象而不仅仅是常规对象?

1 个答案:

答案 0 :(得分:0)

你在这里进行的调用是异步的,你需要在解析调用的成功块中编写你的代码,所以一旦parse的回复回到你的应用程序就会执行它。

    var user = new Parse.User(); 
    user.setUsername($('#username').val());
    user.setEmail($('#email').val());
    user.setPassword($('#pw').val());

            newUser.signUp(null, {
                success: function (user) {
                    // Hooray! Let them use the app now.
                    var html = new EJS({url: 'templates/usershow.ejs'}).render(user);
                    var content = document.getElementById('listuser');
                    content.innerHTML = content.innerHTML + html;
                    $("#signupform").remove();   
                },
                error: function (user, error) {
                    // Show the error message somewhere and let the user try again.
                    //alert("Error: " + error.code + " " + error.message);
                    console.log("Error: " + error.code + " " + error.message);                        
                }
            });