Administrator / test_3

  <?php
  
  use yii\db\Migration;
  
  class m160203_133308_add_field_specialization extends Migration
  {
      public function up()
      {
          $this->addColumn('specialization', 'image', $this->string(255));
      }
  
      public function down()
      {

          $this->dropColumn('specialization', 'image');

      }
  }