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mercurius-upload

v8.0.0

Published

Fastify plugin to support GraphQL uploads using graphql-upload

Downloads

18,820

Readme

mercurius-upload

graphql-upload-minimal implementation plugin for Fastify & mercurius.

Plugin made for Fastify v5:

Install

yarn add mercurius-upload
# or
npm i mercurius-upload
# or
pnpm add mercurius-upload

Usage

Plugin options should conform to https://github.com/flash-oss/graphql-upload-minimal#type-processrequestoptions

fastify.register(require('mercurius-upload'), {
  // options passed to processRequest from graphql-upload-minimal
  // maxFileSize: 1024 * 1024 * 5,
  // maxFiles: 1,
})

or

import MercuriusGQLUpload from 'mercurius-upload'

// ...

fastify.register(MercuriusGQLUpload, {
  // options passed to processRequest from graphql-upload-minimal
})

Example

const GQL = require('mercurius')
const { GraphQLUpload } = require('graphql-upload-minimal')
const fs = require('fs')
const util = require('util')
const stream = require('stream')
const path = require('path')

const pipeline = util.promisify(stream.pipeline)
const uploadsDir = path.resolve(__dirname, '../uploads')

const schema = /* GraphQL */ `
  scalar Upload

  type Query {
    add(x: Int, y: Int): Int
  }

  type Mutation {
    uploadImage(image: Upload): Boolean
  }
`

const resolvers = {
  Upload: GraphQLUpload,
  Query: {
    add: async (_, { x, y }) => {
      return x + y
    },
  },
  Mutation: {
    uploadImage: async (_, { image }) => {
      const { filename, createReadStream } = await image
      const rs = createReadStream()
      const ws = fs.createWriteStream(path.join(uploadsDir, filename))
      await pipeline(rs, ws)
      return true
    },
  },
}

module.exports = function (fastify, options, done) {
  fastify.register(require('mercurius-upload'))

  fastify.register(GQL, {
    schema,
    resolvers,
    graphiql: true,
  })

  done()
}