Start adding async-trait to GraphQLTypeAsync

juniper/Cargo.toml

@@ -35,18 +35,17 @@ default = [
 [dependencies]
 juniper_codegen = { version = "0.14.0", path = "../juniper_codegen"  }
 
+async-trait = "0.1.16"
+chrono = { version = "0.4.0", optional = true }
 fnv = "1.0.3"
+futures-preview = { version = "=0.3.0-alpha.19", optional = true }
 indexmap = { version = "1.0.0", features = ["serde-1"] }
 serde = { version = "1.0.8" }
 serde_derive = { version = "1.0.2" }
-
-chrono = { version = "0.4.0", optional = true }
 serde_json = { version="1.0.2", optional = true }
 url = { version = "2", optional = true }
 uuid = { version = "0.7", optional = true }
 
-futures-preview = { version = "=0.3.0-alpha.19", optional = true }
-
 [dev-dependencies]
 bencher = "0.1.2"
 serde_json = { version = "1.0.2" }

juniper/src/types/async_await.rs

@@ -12,6 +12,7 @@ use crate::BoxFuture;
 
 use super::base::{is_excluded, merge_key_into, Arguments, GraphQLType};
 
+#[async_trait]
 pub trait GraphQLTypeAsync<S>: GraphQLType<S> + Send + Sync
 where
     Self::Context: Send + Sync,
@@ -19,22 +20,22 @@ where
     S: ScalarValue + Send + Sync,
     for<'b> &'b S: ScalarRefValue<'b>,
 {
-    fn resolve_field_async<'a>(
+    async fn resolve_field_async<'a>(
         &'a self,
         info: &'a Self::TypeInfo,
         field_name: &'a str,
         arguments: &'a Arguments<S>,
         executor: &'a Executor<Self::Context, S>,
-    ) -> BoxFuture<'a, ExecutionResult<S>> {
+    ) -> ExecutionResult<S> {
         panic!("resolve_field must be implemented by object types");
     }
 
-    fn resolve_async<'a>(
+    async fn resolve_async<'a>(
         &'a self,
         info: &'a Self::TypeInfo,
         selection_set: Option<&'a [Selection<S>]>,
         executor: &'a Executor<Self::Context, S>,
-    ) -> BoxFuture<'a, Value<S>> {
+    ) -> Value<S> {
         if let Some(selection_set) = selection_set {
             resolve_selection_set_into_async(self, info, selection_set, executor)
         } else {