KumbiaPHP / ActiveRecord

     * @param  string $pk valor para clave primaria

     * @return bool

     */

    public static function exists($pk)

    {

        $source  = static::getSource();

        $pkField = static::getPK();

        return self::query("SELECT COUNT(*) AS count FROM $source WHERE $pkField = ?", $pk)->fetch()->count > 0;

    }

    /**

     * Paginar consulta sql.

     * @param  int    $pk valor para clave primaria

     * @return bool

     */

    public static function delete($pk)

    {

        $source  = static::getSource();

        $pkField = static::getPK();

        return static::query("DELETE FROM $source WHERE $pkField = ?", (int) $pk)->rowCount() > 0;

    }

    /**

     * Buscar por clave primaria.