Method Detail

• toId

   final <BEAN extends Any, ID extends Any, ENTITY extends KEntity<ID>> Binder.BindingBuilder<BEAN, ID> toId(Binder.BindingBuilder<BEAN, ENTITY> $self)

  Converts an entity to its ID and back. Useful for combo boxes which shows a list of entities as their options while being bound to a field containing ID of that entity:

  data class Category(override var id: Long? = null, var name: String = "") : Entity<Long>
  data class Review(override var id: Long? = null, var category: Long? = null) : Entity<Long>
  
  // editing the Review, we want the user to be able to choose the Review's category
  val binder = BeanValidationBinder(Review::class.java)
  val categoryBox = comboBox("Choose a category") {
      setItemCaptionGenerator { it.name }
      isTextInputAllowed = false
      dataProvider = Category.dataProvider
      bind(binder).toId().bind(Review::category)
  }