/**
  * Defines the relationship with the pizzas
  */
 public function getPizza()
 {
     return $this->hasOne(Pizza::className(), ['id' => 'pizza_id']);
 }
 /**
  * Defines the relationship with the pizzas
  */
 public function getPizzas()
 {
     return $this->hasMany(Pizza::className(), ['id' => 'pizza_id'])->via('pizzaIngredients');
     // the relationship needs the junction table to work
 }