FindDescriptor with Link Block Errors out #206
Description
Describe the bug
A FindDescriptor call with an included link block returns an error about non-unique returns
To Reproduce
Add a descriptor with a valid link to an existing metadata entity.
Then issue a find descriptor call, using a combination of FindEntity and Link, and use the affiliated link block with the FindDescriptor call, for example (in python)
constraints = {"name": ["==", "Jane Doe"]}
find_entity_q = query_helpers.find_entity("person", constraints=constraints, ref_tag=1234)
link = query_helpers.create_link(1234)
desc_find = {}
desc_find["set"] = "pretty_faces"
constraints = {"linked_prop": ["==",50]}
desc_find["results"] = {"list": ["linked_prop"]}
desc_find["link"] = link
desc_find["constraints"] = constraints
query_desc = {}
query_desc["FindDescriptor"] = desc_find
trans.append(find_entity_q)
trans.append(query_desc)
Expected behavior
We should have the relevant descriptors linked to the specified FindEntity and their properties returned.