function proses_chekout() {
        $member = $this->db->get_where('tabel_member', array('nama_lengkap' => $this->session->userdata('nama')))->row_array();
        $transaksi = array(
            'member_id' => $member['member_id'],
            'tanggal' => date("Y-m-d"),
            'status' => 1,
            'no_resi' => ''
        );
        $this->db->insert('tabel_transaksi', $transaksi);
        $listProduct = $this->db->get_where('tabel_transaksi_detail', array('transaksi_id'=>0,'ip' => $_SERVER['REMOTE_ADDR']));

        // mendapatkan id terakhir
        $lastTransaksi = $this->db->insert_id();

        foreach ($listProduct->result() as $l) {
            $this->db->where('detail_id', $l->detail_id);
            $this->db->update('tabel_transaksi_detail', array('transaksi_id' => $lastTransaksi));
        }
    }