Give nice error messages on qc_metadata fail

[pjotrp]

[pjotrp]

On wikidata location fail it looks like

Your upload has failed.

            Uploader returned value 1 and said:DEBUG:__main__:Entering sequence uploader
INFO:googleapiclient.discovery:URL being requested: GET https://lugli.arvadosapi.com/discovery/v1/apis/arvados/v1/rest
DEBUG:__main__:Checking metadata
DEBUG:bh20sequploader.qc_metadata:  Testing  against shape https://raw.githubusercontent.com/arvados/bh20-seq-resource/master/bh20sequploader/bh20seq-shex.rdf#submissionShape
    Testing _:b1 against shape https://raw.githubusercontent.com/arvados/bh20-seq-resource/master/bh20sequploader/bh20seq-shex.rdf#sampleShape
    _:b1 context:
       MainSchema:sample _:b1 .
         _:b1 evs:C25164 "2020-05-13" .
         _:b1 obo:GAZ_00000448  .
         _:b1 sio:SIO_000115 "Myunique id" .

      Node:  not in value set:
	 {"values": [{"stem": "http://www.wikidata.org/entity/", "typ...
WARNING:__main__:Failed metadata qc

Not exactly helpful :)

[LLTommy]

This clearly tells us that you did something wrong in the sample part of the submission, I assume you did not enter a location at all, an empty string will not pass. :D

On a serious note, yes it would be good to have nicer messages but this is hard to accomplish. This comes at the moment from the ShEX library directly. For the UI, I propose some additional restrictions (e.g. java script check if what should be an IRI starts "http" or that it is not empty) - so we could catch some of those before submission.

[pjotrp]

The best way to accomplish this is probably by parsing these messages and reformatting them ;). I'll move it to later.