Souke/console/migrations/m170616_112800_add_champs_info_commande.php

<?php

use yii\db\Migration;
use yii\db\Schema;

class m170616_112800_add_champs_info_commande extends Migration
{
    public function up()
    {
        $this->addColumn('etablissement', 'infos_commande', Schema::TYPE_TEXT.' DEFAULT NULL') ;
    }

    public function down()
    {
        $this->dropColumn('etablissement', 'infos_commande') ;
    }

}