platform/packages/graphql/data_loader/README.md

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2019-04-19 03:20:18 +00:00
# data_loader
2019-04-19 03:21:17 +00:00
[![Pub](https://img.shields.io/pub/v/data_loader.svg)](https://pub.dartlang.org/packages/data_loader)
[![build status](https://travis-ci.org/angel-dart/graphql.svg)](https://travis-ci.org/angel-dart/graphql)
2019-04-19 03:20:18 +00:00
Batch and cache database lookups. Works well with GraphQL.
Ported from the original JS version:
https://github.com/graphql/dataloader
## Installation
In your pubspec.yaml:
```yaml
dependencies:
data_loader: ^1.0.0
```
## Usage
Complete example:
https://github.com/angel-dart/graphql/blob/master/data_loader/example/main.dart
```dart
var userLoader = new DataLoader((key) => myBatchGetUsers(keys));
var invitedBy = await userLoader.load(1)then(user => userLoader.load(user.invitedByID))
print('User 1 was invited by $invitedBy'));
```