I used the following filter to include an ACF field in my search results.
add_filter (# pre_get_posts #, so_9224493_adjust_search_query #);
Function so_9224493_adjust_search_query ($ query) {
if (! is_admin () && $ query-> is_search) {// The boolean value! is_admin () ensures that your dashboard is not affected
$ meta_query_arguments = array (
Array (
& # 39; key & # 39; => & # 39; item_number & # 39 ;, // here you would put your meta-key
& # 39; value & # 39; => $ query-> query_vars['s'].
& # 39; compare & # 39; => & # 39; LIKE & # 39 ;,
)
);
$ query-> set (& # 39; meta_query & # 39 ;, $ meta_query_arguments);
};
}
Unfortunately it does not work. However, if it worked, I would like to restrict the search to just this field. I do not want the title or content of posts and pages.
I came across a more promising filter and tried to adapt it to my needs.
Function ni_search_by_title_only ($ search, & $ wp_query) {
global $ wpdb;
if (empty ($ search))
return $ search;
$ q = $ wp_query-> query_vars;
$ n =! empty ($ q['exact'] )? & # 39; & # 39;: & # 39;% & # 39 ;;
$ search =
$ searchand = & # 39; & # 39 ;;
foreach ((array) $ q['search_terms'] as $ term) {
$ term = esc_sql (like_escape ($ term));
$ search. = "{$ searchand} ($ wpdb-> postmeta.meta_value LIKE $ {n} {$ term} {$ n} & # 39;)";
$ searchand = & # 39; AND & # 39 ;;
}
if (! empty ($ search)) {
$ search = "AND ({$ search})";
if (! is_user_logged_in ())
$ search. = "AND ($ wpdb-> posts.post_password = & # 39; & # 39;)";
}
return $ search;
}
add_filter (& # 39; posts_search & # 39 ;, ni_search_by_title_only & # 39 ;, 500, 2);
That will not do. Ideally, it would NOT search all meta_value Fields, but only those of a particular one meta_key,
PS: I'm not interested in a plugin to achieve what I'm looking for
