Administrator / test_3

  <?php
  
  namespace common\models;
  
  use Yii;
  
  /**
   * This is the model class for table "specialization".
   *
   * @property integer $specialization_id
   * @property integer $specialization_pid
   * @property string $specialization_name

   * @property string $image
   * @property string $background

   */
  class Specialization extends \yii\db\ActiveRecord
  {

      /**
       * @inheritdoc
       */
      public static function tableName()
      {
          return 'specialization';
      }
  
      /**
       * @inheritdoc
       */
      public function rules()
      {
          return [

              [['specialization_pid','status'], 'integer'],

              [['specialization_pid'], 'default', 'value' => '0',],
              [['specialization_name'], 'required'],

              [['specialization_name','image','background'], 'string', 'max' => 255],

          ];
      }
  
      /**
       * @inheritdoc
       */
      public function attributeLabels()
      {
          return [
              'specialization_id' => 'Specialization ID',
              'specialization_pid' => 'Specialization Pid',
              'specialization_name' => 'Specialization Name',
              'specialization_parent_name' => 'Specialization Parent Name',

              'image' => 'Картинка',
              'background' => 'Background',
              'status' => 'Status',

          ];
      }
  
  
      public function getParent()
      {
          return $this->hasOne(self::className(), ['specialization_id' => 'specialization_pid']);
      }
  

      public function getChildren()
      {
          return $this->hasMany(self::className(), ['specialization_pid' => 'specialization_id']);
      }
  

  }