CodeIgniter 迁移类 - 创建一个迁移信息

程序语言 PHP
1

这将是一个 blog 站点的第一个迁移信息。所有的迁移信息都在文件夹 application/migrations/ 里，并且具有这样的名称，例如：001_add_blog.php.[code]defined(‘BASEPATH’) OR exit(‘No direct script access allowed’);

class Migration_Add_blog extends CI_Migration {

public function up()
{
$this->dbforge->add_field(array(
‘blog_id’ => array(
‘type’ => ‘INT’,
‘constraint’ => 5,
‘unsigned’ => TRUE,
‘auto_increment’ => TRUE
),
‘blog_title’ => array(
‘type’ => ‘VARCHAR’,
‘constraint’ => ‘100’,
),
‘blog_description’ => array(
‘type’ => ‘TEXT’,
‘null’ => TRUE,
),
));

$this->dbforge->create_table('blog');

}

public function down()
{
$this->dbforge->drop_table(‘blog’);
}[/code]然后在文件 application/config/migration.php 中设置 $config[‘migration_version’] = 1;。

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