.attach didn't upload file

We try to use superagent to upload file to our server by following this guide, https://visionmedia.github.io/superagent/#multipart-requests, on React Native project

here is our implementation code

  superagent.post(full_url)
    .field('type', 'image_type')
    .attach('file', file.uri, {contentType: 'image/png'})
    .then(response => {
      console.log(`response ${JSON.stringify(response.body)}`)
      callback(response.body)
    })
    .catch(error => {
      console.log(`error body json stringify ${JSON.stringify(error)}`)
      errorCallback(error)
    })

file.uri here is image that we got from react-native-camera

the field type was received by server, but the file was not there response from server is, more or less

{
  "status": false,
  "data": "Required request part 'file' is not present"
}

we try to change the attach parameter to .attach('file', file.base64, {contentType: 'image/png'})

and .attach('file', RNFetchBlob.wrap(file.uri), {contentType: 'image/png'})

and also .attach('file', RNFetchBlob.wrap(file.base64), {contentType: 'image/png'})

with no luck

we try to log the form data on attach function,

{
  "_parts": [
    [
      "type",
      "image_type"
    ],
    [
      "file",
      "path/to/file"
    ]
  ]
}

it clearly show that the file is there

calling the same api from Postman is success without a problem

what did we do wrong here? any feedback is welcome

thank you

Superagent: v4.0.0 React Native: v0.57.5 React: v16.6.3 rn-fetch-blob: v0.10.13

[sidhijakpat]

Once again, it was our mistake, the JSON Object should be:

const file = {
  uri: fileUri,
  name: 'image_name.png',
  type: `image/png`
}

Thank you again

[RodolfoGS]

Once again, it was our mistake, the JSON Object should be:

const file = {
  uri: fileUri,
  name: 'image_name.png',
  type: `image/png`
}

Thank you again

Thank you, that works!