It’s possible, but slightly complicated.
Relevanssi searches “TER 100/ARAN” as “TER 100 ARAN”, so since you likely have OR operator enabled, it’ll return all posts that have either “TER”, “100” or “ARAN”.
A good first step would be to remove the slash:
add_filter( 'relevanssi_punctuation_filter', 'rlv_remove_slash' );
function rlv_remove_slash( $replacements ) {
$replacements['/'] = '';
return $replacements;
}
If you add this to the theme functions.php and rebuild the index, now the slashes will be removed and the search becomes “TER 100ARAN”. That’s probably more precise, but if you have lots of TER products, it may still return too many results.
Spaces are the tricky part, since removing them from all places is not possible and removing from only certain places is hard because then the search terms don’t match.
If the fix above isn’t good enough, then something like this might work:
add_filter( 'relevanssi_hits_filter', 'rlv_sku_exact_match' );
function rlv_sku_exact_match( $hits ) {
global $wpdb;
$post_ids = $wpdb->get_col(
$wpdb->prepare(
"SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_sku' AND meta_value = %s",
$hits[1]
)
);
if ( ! $post_ids ) {
return $hits;
}
$hits[0] = array_filter(
$hits[0],
function( $hit ) use ( $post_ids ) {
return in_array( $hit->ID, $post_ids, false );
}
);
return $hits;
}
Add this to the theme functions.php, and whenever a search matches a SKU exactly, only the products with that SKU will be returned.
