.-.-.-.-.-

<?php
defined('BASEPATH') or exit('No direct script access allowed');
class Migration_product_faqs extends CI_Migration
{
    public function up()
    {

$fields = array(
            'updated_by' => array(
                'type'           => 'INT',
                'constraint'     => '11',
                'NULL'           => TRUE,
                'default'        => 0,
                'after'          => 'deliver_by'
            )
        );
        $this->dbforge->add_column('order_items', $fields);

$fields = array(
            'bonus_type' => array(
                'type'           => 'VARCHAR',
                'constraint'     => '30',
                'NULL'           => TRUE,
                'default'        => 'percentage_per_order',
                'after'          => 'address'
            )
        );
        $this->dbforge->add_column('users', $fields);

$fields = array(
            'type_id' => array(
                'type' => 'TEXT',
            ),
        );
        $this->dbforge->modify_column('notifications', $fields);

/* adding new table system_notification */
        $this->dbforge->add_field([
            'id' => [
                'type'           => 'INT',
                'constraint'     => '11',
                'auto_increment' => TRUE,
                'NULL'           => TRUE
            ],
            'title' => [
                'type'           => 'VARCHAR',
                'constraint'     => '128',
                'NULL'           => TRUE
            ],
            'message' => [
                'type'           => 'VARCHAR',
                'constraint'     => '512',
                'NULL'           => TRUE
            ],
            'type' => [
                'type'           => 'VARCHAR',
                'constraint'     => '64',
                'NULL'           => TRUE
            ],
            'date_sent TIMESTAMP default CURRENT_TIMESTAMP',
        ]);
        $this->dbforge->add_key('id', TRUE);
        $this->dbforge->create_table('custom_notifications');

$this->dbforge->add_field([
            'id' => [
                'type'           => 'INT',
                'constraint'     => '11',
                'auto_increment' => TRUE,

],
            'user_id' => [
                'type'           => 'INT',
                'constraint'     => '11',

],
            'product_id' => [
                'type'           => 'INT',
                'constraint'     => '11',

],
            'votes' => [
                'type'           => 'INT',
                'constraint'     => '11',
                'default'        => 0,
            ],
            'question' => [
                'type'           => 'TEXT',
                'NULL'           => TRUE,
                'default'        => 0,
            ],
            'answer' => [
                'type'           => 'TEXT',
                'NULL'           => TRUE,
                'default'        => 0,
            ],
            'answered_by' => [
                'type'           => 'INT',
                'constraint'     => '11',
                'default'        => 0,
            ],
            'date_added TIMESTAMP default CURRENT_TIMESTAMP',
        ]);
        $this->dbforge->add_key('id', TRUE);
        $this->dbforge->create_table('product_faqs');
    }
    public function down()
    {
        $this->dbforge->drop_column('users', 'bonus_type');
        $this->dbforge->drop_column('order_items', 'updated_by');
        $this->dbforge->drop_table('custom_notifications');
        $this->dbforge->drop_table('product_faqs');
    }
}

/home/users/unlimited/www/eshop.codeskitter.site/application/migrations/006_product_faqs.php