Fix the problem of scalar macro.

src/resolver_utils/scalar.rs

@@ -92,16 +92,12 @@ pub trait ScalarType: Sized + Send {
 /// ```
 #[macro_export]
 macro_rules! scalar {
-    ($ty:ty, $name:expr, $desc:literal) => {
-        $crate::scalar_internal!(
-            $ty,
-            ::std::stringify!($ty),
-            ::std::option::Option::Some($desc)
-        );
+    ($ty:ty, $name:literal, $desc:literal) => {
+        $crate::scalar_internal!($ty, $name, ::std::option::Option::Some($desc));
     };
 
-    ($ty:ty, $name:expr) => {
-        $crate::scalar_internal!($ty, ::std::stringify!($ty), ::std::option::Option::None);
+    ($ty:ty, $name:literal) => {
+        $crate::scalar_internal!($ty, $name, ::std::option::Option::None);
     };
 
     ($ty:ty) => {

tests/scalar.rs

@@ -0,0 +1,40 @@
+use async_graphql::*;
+
+mod test_mod {
+    use serde::{Deserialize, Serialize};
+
+    #[derive(Serialize, Deserialize)]
+    pub struct MyValue {
+        a: i32,
+    }
+}
+
+#[async_std::test]
+pub async fn test_scalar_macro() {
+    scalar!(test_mod::MyValue, "MV", "DESC");
+
+    struct Query;
+
+    #[Object]
+    impl Query {
+        async fn value(&self) -> test_mod::MyValue {
+            todo!()
+        }
+    }
+
+    let schema = Schema::new(Query, EmptyMutation, EmptySubscription);
+    assert_eq!(
+        schema
+            .execute(r#"{ __type(name:"MV") { name description } }"#)
+            .await
+            .into_result()
+            .unwrap()
+            .data,
+        value!({
+            "__type": {
+                "name": "MV",
+                "description": "DESC",
+            }
+        })
+    );
+}