[wp-trac] [WordPress Trac] #32537: 404 error on empty title

[WordPress Trac]

#32537: 404 error on empty title
--------------------------+------------------------------
 Reporter:  arhit         |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Permalinks    |     Version:  4.2.2
 Severity:  critical      |  Resolution:
 Keywords:                |     Focuses:
--------------------------+------------------------------

Comment (by tyxla):

 I just confirmed this bug.

 After in-depth inspection, I discovered that this occurs because in the
 `wp_unique_post_slug()` that is being called in the Permalink section in
 the administration (the `edit-slug-box` section).

 Here is a quick example: when you publish a post with no title (but with
 some content), if the post ID is 20, the post name becomes 20-2 in the
 Permalink section. When using `/%postname%/` permalink structure the post
 URL becomes `http://example.com/20-2/`, but the post name in the database
 remains `20`. This is why the 404 error occurs.

 The Permalink section properly calls `wp_unique_post_slug()`, which
 changes `20` to `20-2` to avoid conflicts with date archives (see
 https://core.trac.wordpress.org/browser/trunk/src/wp-
 includes/post.php#L3803).

 But, as said earlier, the post name remains 20, which leads to the 404 not
 found error.

 Currently, in case the post status is `publish`, and the post title and
 post name are empty, the post name is automatically being made the same as
 the post ID. As a fix I recommend that we use `wp_unique_post_slug()` on
 the post name, so it becomes 20-2 as well, making it equal to the current
 behavior in the administration. Of course, this would happen only if the
 post title is empty, otherwise the current behavior should be retained.

 I'm attaching a patch with a fix for that issue. Also including a unit
 test that replicates the issue.

--
Ticket URL: <https://core.trac.wordpress.org/ticket/32537#comment:6>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform