javascript - 使用 Cloud Code 和 PFFacebookUtils 覆盖电子邮件/用户名
<p><p>在使用 Parse 服务时，我试图让用户跳过登录字段，方法是通过 Facebook 登录应用程序并使用 Facebook 信息填写字段。我正在使用 Parse 的 Cloud Code 来使 swift 客户端代码尽可能简单。但是，当我尝试使用云代码设置 <code>Parse.User</code> 的用户名和电子邮件地址字段时，我得到了来自 <code>Parse.Cloud</code> 的一些反馈。在应用内运行时出现以下错误。</p>
<pre><code>: Can't modify username in the before save trigger (Code: 141, Version: 1.6.1)
</code></pre>
<p>当删除用户名功能时，我收到:</p>
<pre><code>: Can't modify email in the before save trigger (Code: 141, Version: 1.6.1)
</code></pre>
<p>通过相同的代码，我还使用相同的方法设置 <code>firstName</code> 和 <code>lastName</code> 没有任何错误。下面是使用的代码。</p>
<p>[云代码]</p>
<pre><code>function pad(num, size){ return ('000000000' + num).substr(-size); }
Parse.Cloud.beforeSave(Parse.User, function (request, response) {
var token = request.object.get("authData").facebook.access_token
Parse.Cloud.httpRequest({
url: 'https://graph.facebook.com/v2.1/me?fields=first_name,last_name,email&access_token=' + token,
success: function(httpResponse) {
var responseData = httpResponse.data;
request.object.set("email", responseData.email) // <- Error Occurs Here
request.object.set("username", responseData.email.split("@").concat(".", pad(Math.floor(Math.random()*10000),4))) // <- Error Occurs Here
request.object.set("firstName", responseData.first_name)
request.object.set("lastName", responseData.last_name)
response.success()
},
error: function(){
response.error("Something went wrong.")
}
})
})
</code></pre>
<p></p>
<pre><code>@IBAction func loginWithFacebookButtonAction(sender: AnyObject){
loginWithFacebookButtonOutlet.setTitle("Logging In...", forState: UIControlState.Normal)
let permissions = ["public_profile", "user_friends", "email"]
PFFacebookUtils.logInWithPermissions(permissions, {
(user: PFUser!, error: NSError!) -> Void in
if user == nil {
println("Uh oh. The user cancelled the Facebook login.")
} else if user.isNew {
println("User signed up and logged in through Facebook!")
self.performSegueWithIdentifier("facebookToApp", sender: self)
} else {
println("User logged in through Facebook!")
self.performSegueWithIdentifier("facebookToApp", sender: self)
}
})
}
</code></pre>
<p>我在这里遇到的其他问题是当用户尝试使用 <code>.save()</code> 而不是 <code>response.success()</code> 时引起的，这似乎没有是这种情况下的问题。</p>
<p>非常感谢。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>似乎 <code>username</code> & <code>email</code> 不能在 <code>beforeSave</code> 触发器中更改，因为它们应该是唯一的</p>
<blockquote>
<p>Right now, the email field cannot be modified on a beforeSave because this field should be unique. If you were to use a value that another user is already using, this would result in an error that your beforeSave method would not be able to handle.</p>
</blockquote>
<p>引用:<a href="https://www.parse.com/questions/why-cant-i-modify-the-email-field-in-a-before-save-trigger" rel="noreferrer noopener nofollow">https://www.parse.com/questions/why-cant-i-modify-the-email-field-in-a-before-save-trigger</a> </p></p>
<p style="font-size: 20px;">关于javascript - 使用 Cloud Code 和 PFFacebookUtils 覆盖电子邮件/用户名，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/27643307/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/27643307/
</a>
</p>
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