Cannot read property 'jqXHR' of undefined

[tophee (Christoph)]

I just did a minor change in the privacy policy but when I submitted the edit, it would not complete saving (the saving wheel kept spinning and spinning). While I was waiting, I went to the TOS (in a new browser tab) to do a change there too. After saving that edit without problems, I went back to the privacy policy, but the wheel was still spinning. So I went ahead and tried to edit the post again (in the same browser tab). Ironically, I found that the change was already made but I wasn’t sure whether it was really saved or whether I was just looking at the same unsaved editor content. So I clicked save to make sure it is saved. That’s when this error popped up.

[codinghorror (Jeff Atwood)]

Can you repro this @techapj?

[techAPJ (Arpit Jalan)]

I am unable to repro this error on latest Discourse version.

[tanius]

For what it’s worth, I just had this same issue with a recent Discourse version (commit c10941b, basically the stable branch from 2019-02-17, not a release).

I was able to reproduce it a few times, but then not anymore, and it’s the first time ever that I had this issue. So very much an edge case …

What happened:

1. I did a major update to a complex wiki post (which is a Discourse manual we wrote for our purposes).

2. As experienced by the OP, Discourse would not complete saving (the saving wheel kept spinning and spinning). I eventually cancelled the process.

3. I tried to make the very same edit again, and this error popped up:

   TypeError: Cannot read property ‘jqXHR’ of undefined

   That was reproducible for several further attempts to make the same edit in this post.

4. I tried to make an edit to a different post, and that went without problems. I tried to post the same edit that failed for the manual wiki as edit to the different post, and that worked without problems, too (so it does not seem to be connected to the posted content).

5. I tried a small (few words) edit to the manual wiki where the original edit failed. That worked, but it took a long time (about two minutes).

6. I tried the failed edit again on the manual wiki, and this time it worked. And all subsequent edits worked, too.

I found the following error log entries for the time and post where this issue happened:

(Edit: upon further inspection, that error in the logs seems rather unrelated as the log shows it also in multiple other cases, which did not involve the “TypeError: Cannot read property ‘jqXHR’ of undefined” error message on the client side. But I saved the JS file where the error happened, if somebody wants to look at it.)

Message (5 copies reported)
Uncaught Error: Not Found
Url: https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js
Line: 14
Column: 25883
Window Location: https://edgeryders.eu/t/discourse-user-manual-for-edgeryders-eu/6463/1
Backtrace
Error: Not Found
    at s (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:14:26084)
    at o (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:14:25941)
    at i (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:14:25836)
    at Object.trigger (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:17:26248)
    at https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:17:28250
    at e.invoke (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:3979)
    at e.flush (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:2902)
    at e.flush (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:4992)
    at e._end (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:9818)
    at e.end (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:6320)
    at e._run (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:10333)
    at e.run (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:6965)
    at a (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:4:29639)
    at Object.r.error (https://edgeryders.eu/assets/application-b7e1701c68247f1198a83883a70ad5264302ef5fd43e37b09ce6d0125baa133a.js:7:26015)
    at u (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:2:6854)
    at Object.fireWith [as rejectWith] (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:2:7603)
    at n (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:3:10363)
    at XMLHttpRequest.<anonymous> (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:3:15221)

Env
    hostname	server.edgeryders.eu
    process_id	27682
    application_version	2.2.1
    HTTP_HOST	edgeryders.eu
    REQUEST_URI	/logs/report_js_error
    REQUEST_METHOD	POST
    HTTP_USER_AGENT	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/73.0.3683.75 Chrome/73.0.3683.75 Safari/537.36
    HTTP_ACCEPT	*/*
    HTTP_REFERER	https://edgeryders.eu/t/discourse-user-manual-for-edgeryders-eu/6463/1
    params
        message	Uncaught Error: Not Found Url: https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb3736
        url	https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06
        line	14
        column	25883
        window_location	https://edgeryders.eu/t/discourse-user-manual-for-edgeryders-eu/6463/1
        stacktrace	Error: Not Found at s (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58

[sam (Sam Saffron)]

Sorry @tanius Akismet thought your post was spam for some reason and deleted it, I just went ahead and undeleted it.

@techAPJ can you re-test given this info?

[sam (Sam Saffron)]

此问题是否仍然存在？

[riking (Kane York)]

“无法读取字段 jqXHR”源自我们围绕失败 AJAX 调用所编写的自定义错误处理代码。

[tanius]

不，没有持久化……过去一年没再见过这个错误。但一开始这就是一个边缘情况，而且无法明确复现，所以我不认为这能证明该问题已不存在……

顺便一提，帖子保存失败的情况还有另一个可以改进的地方。具体来说，当因网络错误导致帖子或帖子编辑保存失败时，系统需要非常长的时间才会告知用户。我希望能提供一种重新提交请求的方式。而“取消”按钮在这里毫无帮助，因为那样会导致丢失帖子或编辑内容。

[codinghorror (Jeff Atwood)]

我们需要复现步骤才能进行任何操作。你试过在 Chrome 的网络标签页中切换到人为设置的不稳定网络吗？这或许能帮助我们复现问题？

[Stefan_Brighiu_M]

我在执行以下操作时遇到了这个错误。
所有内容都在一个插件中完成。

我在 Post 类中添加了一个 Validator……其内容并不重要，但为了回复的完整性，我还是把它列出来。

frozen_string_literal: true

class MainPostValidator < ActiveModel::Validator
def validate(record)
puts ‘TTTTT’
p record

raw = record.raw

unless raw.present?
  post.errors.add :base, 'This record is invalid'
end

end

private
def some_complex_logic
# …
end
end

在运行带有新更改的服务器之前，我已经在网页上打开了帖子编辑页面，准备检查保存更改是否会触发我的验证器。

我重启了服务器，但没有刷新页面！当我在帖子上点击“保存更改”时，我看到了那个错误。一旦我刷新了页面（也许还重启了服务器实例），错误就消失了。

这一切都是在本地开发环境中完成的。

希望这能帮到你

该验证器声明在一个新文件中，而用于应用验证器的 Post 额外代码也放在一个新文件中。

require_dependency 'post' Post.class_eval { include ActiveModel::Validations validates_with MainPostValidator }