Souke/console/migrations/m170327_145311_add_champs_commentaire_credit.php

<?php

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

class m170327_145311_add_champs_commentaire_credit extends Migration
{
    public function up()
    {
        $this->addColumn('credit_historique', 'commentaire', Schema::TYPE_TEXT) ;
    }

    public function down()
    {
        $this->dropColumn('credit_historique', 'commentaire') ;
    }
}