async-juniper.rs

use async_std::task;
use juniper::{EmptyMutation, RootNode};

struct Concrete;

enum CustomName {
  Concrete(Concrete),
}

#[juniper::graphql_object]
impl Concrete {
  fn simple() -> i32 {
    123
  }
}

#[juniper::graphql_union(name = "ACustomNamedUnion")]
impl CustomName {
  fn resolve(&self) {
    match self {
      Concrete => match *self {
        CustomName::Concrete(ref c) => Some(c),
      },
    }
  }
}

struct Query;
#[juniper::graphql_object(Context = State)]
impl Query {
  fn custom_name() -> CustomName {
    CustomName::Concrete(Concrete)
  }
}

struct State {}
type Schema = RootNode<'static, Query, EmptyMutation<State>>;
fn schema() -> Schema {
  Schema::new(Query, EmptyMutation::<State>::new())
}

#[async_std::main]
async fn main() -> std::io::Result<()> {
  let ctx = State {};

  // Run the executor.
  let (res, _errors) = juniper::execute_async(
    "query { favoriteEpisode }",
    None,
    &Schema::new(Query, EmptyMutation::new()),
    &juniper::Variables::new(),
    &ctx,
  )
  .await
  .unwrap();

  Ok(())
}