Thanks for the response – I sort of feared that. It’s okay, I’m just going to replace the relationship field with a WP Advanced Search and write my own AJAX functions to add the posts to the current post’s custom field.
Thanks again.
The answer linked in that other post shows that you need to merge two arrays, one searching the titles and the other searching the meta_query.
http://wordpress.stackexchange.com/questions/78649/using-meta-query-meta-query-with-a-search-query-s
I’m just wondering if this is beyond the scope of adjusting the search that happens for relationship item types in ACF. It seems like I can only manipulate the $args, and not the query itself, in order to merge two queries.
I realize that what I’m asking is a version of this question:
http://support.advancedcustomfields.com/forums/topic/wp_query-search-results-with-s-and-meta_query-at-the-same-time/
But the solution is to modify the query. I see that I can modify the $args for the query, but not the query itself. Is there a way to modify the query that is performed to do the AJAX search for relational objects?