WordPress may display incorrect message when post is saved/published/etc

[sirzooro]

When post is saved, WP calls wp_insert_post_data filter. Plugin can use it to change post status. But even post status has been changed via plugin, WP still displays message basing on action originally executed by user. Need to change this and take into account final post status too.

Note: I have found this while testing ​WyPiekacz plugin on WP 2.9. This plugin checks if post submitted for review or published satisfies set of rules, and changes its status to Draft if not. In 2.8 I was able to change displayed message by overwriting $_GET['message'] in admin_notice hook, but this does not work in 2.9 because of changes in wp-admin/edit-form-advanced.php.

Have you tried using the filter redirect_post_location?

No - this is a new filter added in WP 2.9. I can use it, but this does not fix this problem in general.

A potential fix might be to generalize the message displayed sothat it will fit for all cases. How does that sound?

Realted: #11515 (and this ticket's content is an intersting use-case to that one)

I think it should be sufficient to extend statuses list in wp-admin/post.php to include all possible post statuses.

BTW, it may be funny when someone will use wp_insert_post_data filter to trash/untrash post :)

The Short: I just tested this on r14235 and it seems to be working well.

The long version (Steps I took to reproduce):

1) Installed said theme
2) Created rule for minimum 1000 words per post
3) Unchecked box to let admin bypass rules
4) Created new post with less than 1000 words
5) Hit publish

Results were that I got the following plugin messages:
1) Post is too short (minimum is 1000 chars, your post has 416).
2) Post Status has been changed to Draft.

And the following WordPress generated message: "Post draft updated. Preview post"

When including more than a 1000 words, I got the default "Publish Posted" message from WordPress. If I then take the number of words below 1000, we go back to the plugin and wordpress messages mentioned above. Everything seems to be working.

@blepoxp: current verwsion of WyPiekacz plugin uses redirect_post_location filter to override target url, so WP displays expected message. Please edit plugin file and disable this filter (comment out line 68) and try again.

Ok. I see now. BTW, this ticket is referenced in inline documentation for wp_insert_post: http://core.trac.wordpress.org/ticket/9084 It's closed as 'fixed'. Not the same issue or not a real fix?

This fixes it for the reported solution.

I think the bug only happened when a filter has changed the status from publish to draft. If this is the case, my patch should fix the problem. In a little bit of a rush to change locations right now so I can test more thoroughly later tonight for unintended consequences... i think this should do it though.

I did a little more testing, I think this is the best solution. The code was always taking the final post status into account correctly. The problem was that it also assumed that if $_POST[ 'publish' ] was set, the status would not be draft.

I tested it by placing the following code in twentyten's functions.php and changing the status. It works correctly for all possible stati:

function change_status( $data ) {
	$data['post_status'] = 'publish';
	return $data;
}
add_filter( 'wp_insert_post_data', 'change_status' );

I can't figure out which post.php this patch refers to.

Please read: ​http://codex.wordpress.org/Reporting_Bugs#Patch_Writing_Guidelines

Also, it probably needs a refresh.