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Upload Files With GraphQL, Apollo, and React-Native

React-Native: we need extra component: RNFetchBlob
With React-Native, it’s a little bit more complicated. It boils down to intercepting the outgoing request and changing it to be a multi-part form and injecting the file blob.
To trigger the action, you can include a special flag in your mutation that tells the code to treat the variable “file” as a file to upload.

in ReactJS web app we only need do this, because with web sites, browser helps out with setting up a multi-part form request.

Front end:

variables: {
file: photos[0]
.then(async ({ data }) => {})
.catch(error => setMessage(error.message))

GraphQL API:

uploadFileToAndmap: combineResolvers(
// isAuthenticated,
async (parent, args, { models }) => {
const { file } = await args
const { createReadStream, filename, mimetype, encoding } = await file
const stream = createReadStream()
const result = await RestAPI.uploadFileToAndmap(filename, stream)
return result


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To allow file uploads in your GraphQL web app, there are several options: using Base64 encoding. But it will make the request larger and expensive to encode/decode.making a separate API endpoint just for this purpose.using a library like Apollo for implementing the GraphQL multipart request specification.uploadFileToS3:combineResolvers( // isAuthenticated, async (parent, args, { models }) => { const { file } = awaitargs const { createReadStream, filename, mimetype, encoding } = awaitfile conststream = createReadStream() constresult = awaituploadFileToS3(filename, stream) returnresult } ),