https://bugzilla.wikimedia.org/show_bug.cgi?id=26743
Summary: Show preview without javascript results in thread and
edit form not showing if it has been bumped since you
clicked reply
Product: MediaWiki extensions
Version: any
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: Normal
Component: LiquidThreads
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Here are the steps to reproduce this bug, bear with me:
1. Disable javascript
2. Open a talk page in two tabs in your browser.
3. Click "reply" on the same comment in both tabs
4. Type something in both tabs
5. In one tab, click save page, wait for the comment to be saved. Make sure you
bump the thread.
6. In the other tab, click show preview.
After this, the thread you were replying to will not be shown (including the
edit form), which means you just lost your comment.
I've tracked down the bug to LqtDiscussionPager::getRows(). The problem is that
this function calls a mysql query that selects all root threads where
thread_sortkey<offset, where offset is the timestamp of the latest comment when
you clicked reply. However, since the thread has since been bumped, the root
comment now has a sortkey larger than this timestamp, so it won't be selected.
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