gistfile1.txt

    /**
     * Filtro per il recupero degli annunci che appartengono a determinati servizi
     *
     * @param Query $query
     * @param array $options
     * @return Query
     */
    public function findServices(Query $query, array $options)
    {
        if (empty($options['matching'])) {
            return $query->contain(['Services']);
        } else {
            return $query
                ->matching('Services', function(Query $q) use ($options) {
                    $operator = empty($options['exclude']) ? 'IN' : 'NOT IN';
                    return $q->where(["Services.id $operator" => $options['Services.id']]);
                });
        }
    }