Reply To: How to use "Taxonomy Filter" of Related Post(s) field option.

Author Replies
traversal # Posted on May 20, 2015 at 11:13 am

This field lets you filter the posts returned for that select box, and is basically parsed and transformed into a tax_query for the query.

https://codex.wordpress.org/Class_Reference/WP_Query#Taxonomy_Parameters

There is one restriction, you can only use this if you have a single post type selected for your select box.

Each line of this box represents a single item in the tax_query array you’d pass to tax_query. The line should be of the form:

taxonomy [IN] or [NOT IN] slug1,slug2,slugn

So for example, suppose you wanted all posts with speed “fast,slow”, with tag “featured”:

speed IN fast,slow
post_tag IN featured

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