async-graphql 0.5.0

The GraphQL server library implemented by rust
Documentation 
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#[async_graphql::Enum]
enum MyEnum {
    A,
    B,
}

#[async_graphql::InputObject]
struct MyInputObj {
    #[field(default = "\"hehe\"")]
    a: i32,
    b: i32,
}
#[async_graphql::Object(
    field(name = "a", type = "i32"),
    field(owned, name = "b", type = "i32"),
    field(owned, name = "c", type = "Option<String>")
)]
struct MyObj {
    value: i32,
}

#[async_trait::async_trait]
impl MyObjFields for MyObj {
    async fn a<'a>(&'a self, ctx: &async_graphql::Context<'_>) -> async_graphql::Result<&'a i32> {
        Ok(&self.value)
    }

    async fn b(&self, ctx: &async_graphql::Context<'_>) -> async_graphql::Result<i32> {
        Ok(999)
    }

    async fn c(&self, ctx: &async_graphql::Context<'_>) -> async_graphql::Result<Option<String>> {
        Ok(Some(format!("**{}**", self.value)))
    }
}

#[async_std::main]
async fn main() {
    let schema = async_graphql::Schema::<MyObj, async_graphql::GQLEmptyMutation>::new();
    let res = schema
        .query(
            MyObj { value: 100 },
            async_graphql::GQLEmptyMutation,
            "{ a b c __schema { types { kind name description } } }",
        )
        .execute()
        .await
        .unwrap();
    serde_json::to_writer_pretty(std::io::stdout(), &res).unwrap();
}