Drive API, Partial resources: "fields" request parameter not settable

[fmenou]

Partial responses

The official documentation of partial resources is misleading:

By default, the server sends back the full representation of a resource after processing requests.

This is blatantly false, at least for Files* endpoints.

The default behavior for the Drive API is to return a subset of fields for at least the GetFile endpoint unless one explicitly ask for more fields.

This is not yet settable in the gogol-drive generated endpoints

The fields request parameter common to all Drive API endpoints can't be set at the moment. This is one of the "Standard Query Parameters".

I can get why it's missing since it's specified globally here.

The fields query param might be a very interesting add to the gogol-drive module :)

Since I'm still discovering the gogol-* modules I won't pretend to know how to do that. I'm just an humble and happy user of it, you guys rock ❤️ .

My workaround for information

One option is to set fields to * to have the whole data as a query param.

I've a dirty workaround for my local usecase consisting of patching the Network.HTTP.Client ManagerSettings with managerModifyRequest:

import           Data.ByteString     (isPrefixOf)
import           Data.Semigroup      ((<>))
import           Network.HTTP.Client (ManagerSettings, Request,
                                      managerModifyRequest, path,
                                      queryString)

managerSettings :: ManagerSettings
managerSettings = tlsManagerSettings { managerModifyRequest = askAllFieldsForFiles }

askAllFieldsForFiles :: Request -> IO Request
askAllFieldsForFiles req
  | "/drive/v3/files/" `isPrefixOf` path req = askAllFields req
  | otherwise                                = pure req

askAllFields :: Request -> IO Request
askAllFields req = pure req { queryString = queryString req <> "&fields=*" }

[hsenag]

Thanks a lot for this workaround - I just ran into the same problem. It looks like the path is just /drive/v3/files with nothing after now so I had to tweak the guard a bit.