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<?php
use yii\db\Schema;
use yii\db\Migration;
class m150722_150000_single_tree extends Migration
{
public function up()
{
$tableOptions = null;
if ($this->db->driverName === 'mysql') {
// http://stackoverflow.com/questions/766809/whats-the-difference-between-utf8-general-ci-and-utf8-unicode-ci
$tableOptions = 'CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE=InnoDB';
}
$this->createTable('{{%single_tree}}', [
'id' => Schema::TYPE_PK,
'lft' => Schema::TYPE_INTEGER . ' NOT NULL',
'rgt' => Schema::TYPE_INTEGER . ' NOT NULL',
'depth' => Schema::TYPE_INTEGER . ' NOT NULL',
], $tableOptions);
$this->createIndex('lft', '{{%single_tree}}', ['lft', 'rgt']);
$this->createIndex('rgt', '{{%single_tree}}', ['rgt']);
}
}