Dataset upsertWithWhere

[dylanmcreynolds]

The old backend has upsertWithWhere endpoints for Datasets, RawDatasets, DerivedDatasets.

Use of these datasets was recently added to pyscicat SciCatProject/pyscicat#12

I don't see a similar method in the new backend. Was this some fancy loopback magic? Should pyscicat search for the dataset and send a PUT if it exists to get the same upsert?

[dylanmcreynolds]

Discussed at the dev meeting. The current thinking is that we not bring upsert into the new backend. It is auto-created by loopback, and does not have a similar automatic method in nest.js. It's also bit of niche case, and could be done in the client code.