Struct async_graphql::dataloader::DataLoader

[+] Show declaration

pub struct DataLoader<T> { /* fields omitted */ }

This is supported on crate feature dataloader only.

[−] Expand description

Data loader.

Reference: https://github.com/facebook/dataloader

Implementations

impl<T> DataLoader<T>[−]

pub fn new(loader: T) -> Self[−]

Create a DataLoader with the Loader trait.

pub fn delay(self, delay: Duration) -> Self[−]

Specify the delay time for loading data, the default is 1ms.

pub fn max_batch_size(self, max_batch_size: usize) -> Self[−]

pub fn Specify the max batch size for loading data, the default is 1000.

If the keys waiting to be loaded reach the threshold, they are loaded immediately.

pub async fn load_one<K>(&self, key: K) -> Result<Option<T::Value>, T::Error> where
    K: Send + Sync + Hash + Eq + Clone + 'static,
    T: Loader<K>, [−]

Use this DataLoader load a data.

pub async fn load_many<K>(
    &self,
    keys: impl Iterator<Item = K>
) -> Result<HashMap<K, T::Value>, T::Error> where
    K: Send + Sync + Hash + Eq + Clone + 'static,
    T: Loader<K>, [−]

Use this DataLoader to load some data.