Model change: add 1:1 link Person:User

core/models/troggle.py

@@ -5,6 +5,7 @@ getcontext().prec = 2  # use 2 significant figures for decimal calculations
 
 from django.db import models
 from django.urls import reverse
+from django.contrib.auth.models import User
 
 import settings
 
@@ -82,8 +83,10 @@ class Person(TroggleModel):
     first_name = models.CharField(max_length=100)
     last_name = models.CharField(max_length=100)
     fullname = models.CharField(max_length=200) # display name, but should not be used for lookups
-    nickname = models.CharField(max_length=200)
+    nickname = models.CharField(max_length=200, blank=True)
     slug = models.SlugField(max_length=50, blank=True, null=True) # unique, enforced in code not in db
+    # no delete cascade. We have users without Persons, and Persons without users
+    user = models.OneToOneField(User, models.SET_NULL, blank=True, null=True) 
 
     is_vfho = models.BooleanField(
         help_text="VFHO is the Vereines für Höhlenkunde in Obersteier, a nearby Austrian caving club.",
@@ -92,7 +95,7 @@ class Person(TroggleModel):
     is_guest = models.BooleanField(default=False) # This is per-Person, not per-PersonExpedition
     mug_shot = models.CharField(max_length=100, blank=True, null=True)
     blurb = models.TextField(blank=True, null=True)
-    orderref = models.CharField(max_length=200)  # for alphabetic
+    orderref = models.CharField(max_length=200, blank=True)  # for alphabetic
 
     def get_absolute_url(self):
         # we do not use URL_ROOT any more.