Bug in wp_set_post_categories function

[faaiq]

wp_set_post_terms( $post_id, $post_categories, 'category', $append ); category is being passed staticky. so wp_set_post_categories is not working to map custom category with custom post type. it is not making any entry for custom post type in the table wp_term_relationships.

In the wp_set_post_categories function in the wp-includes/post.php file.

Before update:
return wp_set_post_terms( $post_id, $post_categories, 'category', $append );

After update:
return wp_set_post_terms( $post_id, $post_categories, $post_type, $append );

Trac ticket: 59215

[SergeyBiryukov]

Hi there, welcome to WordPress Trac! Thanks for the ticket.

Looking at the PR, it does not appear to be correct (as demonstrated by the failing unit tests), because the third parameter of wp_set_post_terms() is the taxonomy name, not the post type. Looking further, the post type does not seem relevant at all, since the underlying wp_set_object_terms() function does not use it, only the post ID.

so wp_set_post_categories is not working to map custom category with custom post type.

1. Could you provide the steps to reproduce the issue on a clean install?
2. wp_set_post_categories() is indeed specific to categories by design. Perhaps wp_set_post_terms() would work for your use case?