Search engine searchapi does not support retrieving per doc metadata directly

Describe the bug When using the searchapi searchengine, I get the following error:

Search engine searchapi does not support retrieving per doc metadata directly

To Reproduce

Using the newly pushed docker image released after https://github.com/o19s/quepid/issues/890

https://hub.docker.com/layers/o19s/quepid/latest/images/sha256-bb94695eb976fa83e51c71c49436e9da3063d720607ed9961aca7c8399e372a7

Load a Case that uses searchapi - the case never loads results.

Name: None specified, using generated name

Search engine:  searchapi

Endpoint url: http://name-of-internal-service/search/

Custom headers: { "Authorization": "Token BLAHBLAHBLAH", "Accept": "application/json", "Content-Type": "application/json", "FOO": "BAR"}

API method: POST

Proxy Requests: true

Basic Auth Credential: 0

Options:

Custom Code Mapper:

numberOfResultsMapper = function(data){
  return data.length
};

docsMapper = function(data){...

Expected behavior

The case should not error

Screenshots

Additional context

I have tracked it down to https://github.com/o19s/splainer-search/commit/9034c0bb86a42828a66efc4badcae0e687302b23

o19s / splainer-search

Search engine searchapi does not support retrieving per doc metadata directly #140