Exclusive search for p2p

gistfile1.aw

<?php

	add_action( 'pre_get_posts', 'query_for_recipe_search' );
	function query_for_recipe_search( $query ) {
		if ( is_recipe_search() && is_main_query() ) {
			$ingredients = isset( $_GET["search_ingredients"] ) ? $_GET["search_ingredients"] : NULL;

			if ( is_array( $ingredients ) ) {

				global $wpdb;

				$recipes = $wpdb->get_col( $wpdb->prepare( "SELECT p1.id from wp_posts p1
						  INNER JOIN wp_p2p p2p on p2p.p2p_from=p1.id
						  where p2p_to IN (%s)
						  GROUP BY p1.id
						  HAVING COUNT(p2p.p2p_to) = %d", join( "','", $ingredients ), count( $ingredients ) ) );
				if ( $recipes ) {
					$query->query_vars["post__in"] = $recipes;
				}

			}
		}

		return $query;
	}