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Fixes for async example

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jsus 2021-09-20 23:39:24 +03:00 committed by Christian Legnitto
parent dfda435bc7
commit 18c479e999
1 changed files with 4 additions and 7 deletions
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11
docs/book/content/types/objects/using_contexts.md
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@ -105,24 +105,21 @@ struct Database {
requested_count: HashMap<i32, i32>,
}
impl juniper::Context for Database {}
struct User {
id: i32,
name: String,
times_requested: i32,
name: String
}
#[graphql_object(context = RwLock<Database>)]
#[graphql_object(context=RwLock<Database>)]
impl User {
async fn times_requested<'db>(&self, context: &'db RwLock<Database>) -> Vec<&'db User> {
async fn times_requested<'db>(&self, context: &'db RwLock<Database>) -> i32 {
// Acquire a mutable reference and await if async RwLock is used,
// which is necessary if context consists async operations like
// querying remote databases.
// If context is immutable use .read() on RwLock.
let mut context = context.write().await;
// Preform a mutable operation.
context.requested_count.entry(self.id).and_modify(|e| { *e += 1 }).or_insert(1)
context.requested_count.entry(self.id).and_modify(|e| { *e += 1 }).or_insert(1).clone()
}
fn name(&self) -> &str {