Configure ERD2WEditToOneRelationship to show a list of objects. User chooses one, validation error - "a prescription must have a medication".
I've had a similar problem before when the foreign key was accidentally a class property.
For anyone with a similar problem, make sure your keyWhenRelationship key is not returning a text string with a trailing space. It is a difficult to track bug but resulted in much pulling of hair. My userPresentableDescription was configured to build a string from a number of the object's properties and I left a trailing space for some objects.
I've seen prior reports on the mailing list so hope this might solve a similar problem for others.
Best wishes,
Mark
--
Dr. Mark Wardle
Consultant Neurologist, University Hospital Wales, Cardiff, UK
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