multiple values for experiment_type in 3A metadata not propagating to record

[ksg52]

The 3A beamline schema has a key "experiment_type" which is defined as type = list_str, with multiple = true. When I specify multiple values for experiment_type during metadata capture from SPEC, my choices are accurately captured in the sample's metadata .json file, but keep appearing as only "scattering/diffraction" (the default value) when I view the submitted record on the FOXDEN web interface (dev, in this case).

An example is the record with DID /beamline=3a/btr=test-123-a/cycle=2026-1/sample_name=test-16, the corresponding .json created by SPEC can be found at: /nfs/chess/aux/cycles/2026-1/id3a/test-123-a/test-16.

Other key/value pairs with type = list_str and multiple=true appear to be propagated correctly, e.g. technique and detectors.

@vkuznet @keara-soloway not sure at what step this discrepancy is cropping up, so tagging both of you.

[vkuznet]

@ksg52 , it is not an issue with FOXDEN, I used your test record on foxden to populate web UI form where I intentionally selected multiple values for experiment_type and everything works as expected. Please see this record:

https://foxden-dev.classe.cornell.edu:8344/record?did=/beamline=3a/btr=test-demo/cycle=2026-1

and you may inspect JSON or Record tabs to see how values are assigned.

I suggest that @keara-soloway will have a look at SPEC macro to see where this value is populated and fix the issue over there.