Struct async_graphql::dataloader::DataLoader

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

This is supported on crate feature dataloader only.

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.