Bulk Edit overrites non hierarchical taxonomies

[prettyboymp]

When bulk editing posts, leaving the post_tags field blank causes all the tags to be deleted for the updated posts. Bulk editing taxonomies should only be additive like it is with hierarchical taxonomies.

To reproduce:

1. Set tags for a post
2. Bulk edit that post, but don't make any changes.
3. Hit Update.

The tags have been removed from the post.

[nacin]

I'm guessing this was the result of one of my changesets.

[scribu]

Related: [14230]

[nacin]

When reading this I had thought [14117] would be the culprit.

[dd32]

This may be related to my fix for #10122, But this appears to work for me.

If i add a tag, or custom flat tax term of 'OVERWRITE' or leave it blank, it simply adds or retains the current term list...

If you can still see the problem, please re-open this.

[dd32]

Ok, I was wrong. I can confirm this bug still exists, Not sure why it appeared to work correctly.

[ryan]

Reproduced problem without patch. Tested the following with patch:

• Add tags and cats via edit form
• Remove tags and cats via edit form
• Add via quick edit
• Remove via quick edit
• Add via bulk edit, verify new terms are additive, verify no terms are removed

[ryan]

[14580]