An example of GraphQL execution with Sangria which uses GraphQL input object notation for variables and execution results (no JSON is involved at any point)

EndToEndGraphQL.scala

import sangria.marshalling.queryAst._
import sangria.macros._
import sangria.ast

val query =
  graphql"""
    query MyQuery($$humanId: String!, $$episode: Episode!) {
      hero(episode: $$episode) {
        id, name, appearsIn
      }

      human(id: $$humanId) {
        name
        friends {
          id
          name
        }
      }
    }
  """

val variables =
  graphqlInput"""
    {
      humanId: "1003"
      episode: NEWHOPE
    }
  """

val result: Future[ast.Value] =
  Executor.execute(StarWarsSchema, query,
    userContext = new CharacterRepo,
    deferredResolver = new FriendsResolver,
    variables = variables)

val rendered: String =
  QueryRenderer.render(result.await, QueryRenderer.PrettyInput)

println(rendered)