Hi! For the apollo federation `@requires`/`@extern...

# graphql-kotlin

[Alex Lange]

Hi! For the apollo federation `@requires`/`@external` fields, we have to populate those fields ourselves in the entity reference resolver, right?

For example, in the docs: https://opensource.expediagroup.com/graphql-kotlin/docs/7.x.x/schema-generator/federation/federated-directives#requires-directive we have

@KeyDirective(FieldSet("id"))
class Product(val id: String) {
  @ExternalDirective
  var weight: Double by Delegates.notNull()

  @RequiresDirective(FieldSet("weight"))
  fun shippingCost(): String { ... }
}

in the reference resolver for Product, we would have to set the weight var there by checking for the weight value in the representation?

[Dariusz Kuc]

yes

[Dariusz Kuc]

entity map representation will include those extra fields on the request -> it is up to you to instantiate the entity with all the required info

[Alex Lange]

okay cool makes sense, thank you!