GraphQLRootType

public protocol GraphQLRootType : GraphQLObject

GraphQL Root Type

An GraphQL Object that is at the Root of a Schema. Can either be a Query Type or a Mutation Type

The only additional requirement for a GraphQLType is that it can be initialized with a ViewerContext. The ViewerContext in this scenario refers to a Context Object, that tells the Query/Mutation Type what it needs to know about the User who is requesting the data.

Example

If we are building a Todo App and want allow users to request their Todos. We can use the User as a ViewerContext

class Query: GraphQLRootType {
   let user: User

   func myTodos() -> [Todo] { ... }

   init(viewerContext user: User) {
       self.user = user
   }
}

This is then translated into:

type Query {
   myTodos: [Todo!]!
}