It’s not possible without a more custom query/filter.
I have achieved it with a filter (code taken from this guy on this gist – https://gist.github.com/elvismdev/61f8509eff8abcc21ef84154b74fbf56)
function f1_egpaf_meta_or_tax( $where, \WP_Query $q ) {
// Get query vars.
$tax_args = isset( $q->query_vars['tax_query'] ) ? $q->query_vars['tax_query'] : null;
$meta_args = isset( $q->query_vars['meta_query'] ) ? $q->query_vars['meta_query'] : null;
$meta_or_tax = isset( $q->query_vars['_meta_or_tax'] ) ? wp_validate_boolean( $q->query_vars['_meta_or_tax'] ) : false;
// Construct the "tax OR meta" query.
if ( $meta_or_tax && is_array( $tax_args ) && is_array( $meta_args ) ) {
global $wpdb;
// Primary id column.
$field = 'ID';
// Tax query.
$sql_tax = get_tax_sql( $tax_args, $wpdb->posts, $field );
// Meta query.
$sql_meta = get_meta_sql( $meta_args, 'post', $wpdb->posts, $field );
// Modify the 'where' part.
if ( isset( $sql_meta['where'] ) && isset( $sql_tax['where'] ) ) {
$where = str_replace(
[ $sql_meta['where'], $sql_tax['where'] ],
'',
$where
);
$where .= sprintf(
' AND ( %s OR %s ) ',
substr( trim( $sql_meta['where'] ), 4 ),
substr( trim( $sql_tax['where'] ), 4 )
);
}
}
return $where;
}
add_filter( 'posts_where', 'f1_egpaf_meta_or_tax', PHP_INT_MAX, 2 );
Then, just add '_meta_or_tax'
=>trueto the
argsarray passed to
WP_Query()`