How to access a future through parking_lot guard about async-graphql

[sunli829]

This could be the reason:
Async_graphql internally calls MutationRoot::set_value with an indirect boxing Pin<Box<dyn Future<Output = Result<()>> + 'a + Send>>, and RwLockGuard does not implement Send.

Synchronization lock is not recommended, use async_std::sync::RwLock to solve this problem.

use async_std::sync::RwLock;

#[Object]
impl MutationRoot {
    #[field]
    async fn set_value(&self, thing_value: String) -> bool {
        self.thing.write().await.set_the_value(thing_value).await;
        true
    }
}

[dusty-phillips]

Ah, thanks. That works for my immediate problem, although it shows that I'm going to have a much worse time working with a deeply nested parking_lot lock in a dependent library later. 🤢