def update_crosswalk(user, server, id):
""" Look up Crosswalk for user and add patient_id """
try:
xwalk = Crosswalk.objects.get(user=user)
except Crosswalk.DoesNotExist:
xwalk = Crosswalk()
xwalk.user = user
if xwalk.fhir_id:
return xwalk
else:
xwalk.fhir_id = id
xwalk.fhir_source = server
xwalk.save()
return xwalk
