Fix adding patients outside of Jersey #1191
Merged
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Fixes #1190
Patients outside of Jersey have
nhs_number
, notunique_reference_number
. However they were ending up with their URN being the empty string (Django convention). This then broke theunique_together
constraint.This PR adds a cleaner to convert the empty strings to null, following the suggestion here: https://stackoverflow.com/questions/5772176/django-unique-together-and-blank-true.
We don't have the problem in reverse as we already null out the NHS number for Jersey patients in the respective cleaner.