Administrator / test_3

<?php

use yii\db\Migration;

class m160301_105759_chat extends Migration
{
    public function up()
    {
        $this->createTable('{{%chat}}', [
            'chat_id' => $this->primaryKey(),
            'status' => $this->string(),
            'comment' => $this->string(),
            'from_user' => $this->integer(),
            'to_user' => $this->integer(),
        ]);

        $this->addForeignKey('chat_from_user', '{{%chat}}', 'from_user', '{{%user}}', 'id', 'SET NULL', 'NO ACTION');
        $this->addForeignKey('chat_to_user', '{{%chat}}', 'to_user', '{{%user}}', 'id', 'SET NULL', 'NO ACTION');
    }

    public function down()
    {
        $this->dropForeignKey('chat_from_user', '{{%chat}}');
        $this->dropForeignKey('chat_to_user', '{{%chat}}');
        $this->dropTable('{{%chat}}');
    }
}