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@envelop/dataloader

v6.0.0

Published

This plugin helps you to create a new [DataLoader](https://github.com/graphql/dataloader) instance every time your context is being built. The created instance is injected into the `context` with the name your wish to use.

Downloads

13,186

Readme

@envelop/dataloader

This plugin helps you to create a new DataLoader instance every time your context is being built. The created instance is injected into the context with the name your wish to use.

Getting Started

yarn add dataloader @envelop/dataloader

Usage Example

import DataLoader from 'dataloader'
import { execute, parse, specifiedRules, subscribe, validate } from 'graphql'
import { envelop, useEngine } from '@envelop/core'
import { useDataLoader } from '@envelop/dataloader'

const getEnveloped = envelop({
  plugins: [
    useEngine({ parse, validate, specifiedRules, execute, subscribe }),
    // ... other plugins ...
    useDataLoader('users', context => new DataLoader(keys => myBatchGetUsers(keys)))
  ]
})

Then, when you need to use it in your resolvers, just take it from the context:

export const resolvers = {
  Query: {
    user: (root, args, context, info) => {
      return context.users.load(args.id)
    }
  }
}

Notes

There are several ways to create and use DataLoader, please refer to: https://github.com/graphql/dataloader#caching-per-request for more details.