Replace use of RawSQL with functions.

As Django 4.2 does not group on RawSQL automatically any more.

productions/objshow.py

@@ -1,15 +1,17 @@
 from datetime import datetime
 from functools import partial
 from django.core.paginator import Paginator, InvalidPage
-from django.db.models import Q, Max
-from django.db.models.expressions import RawSQL
+from django.db.models import Q, Max, Min, Case, When, F
+from django.db.models.functions import Coalesce
+# from django.db.models.expressions import RawSQL
 from django.http import Http404
 from django.shortcuts import render
 from .models import Production, Part, ProductionCompany
 from plays.models import Play
 from places.models import Place
 from people.models import Person
 from aggregates import Concatenate
+from fields import ApproximateDateField
 
 
 # object is Place, Person, Play, or ProductionCompany
@@ -33,10 +35,13 @@ def productions_filter(object, type, date_filter):
     else:
         raise Exception('Strange call to productions_filter')
 
+    end_date_field = f"{annotate_extra}end_date"
+    press_date_field = f"{annotate_extra}press_date"
+    start_date_field = f"{annotate_extra}start_date"
     o = o.annotate(
-        max_end_date=Max(annotate_extra + 'end_date'),
-        max_press_date=Max(annotate_extra + 'press_date'),
-        max_start_date=Max(annotate_extra + 'start_date')
+        max_end_date=Max(end_date_field),
+        max_press_date=Max(press_date_field),
+        max_start_date=Max(start_date_field)
     )
     filter = (~Q(max_end_date='') & Q(max_end_date__lt=now)) | Q(max_end_date='', max_press_date__lt=now) | Q(max_end_date='', max_press_date__isnull=True, max_start_date__lt=now)
     if filter_extra:
@@ -54,9 +59,10 @@ def productions_filter(object, type, date_filter):
         o = o.annotate(part__role__concatenate=Concatenate('part__role', distinct=True))
 
     if date_filter == 'past':
-        return o.annotate(best_date=RawSQL('MIN(IFNULL(productions_place.press_date, IF(productions_place.end_date!="", productions_place.end_date, productions_place.start_date)))', ())).order_by('-best_date')
+        return o.annotate(best_date=Min(Coalesce(press_date_field, Case(When(**{end_date_field: ""}, then=F(start_date_field)), default=F(end_date_field)), output_field=ApproximateDateField()))).order_by('-best_date')
+        # return o.annotate(best_date=Min(RawSQL('IFNULL(productions_place.press_date, IF(productions_place.end_date!="", productions_place.end_date, productions_place.start_date))', ()))).order_by('-best_date')
     else:
-        return o.order_by(annotate_extra + 'start_date', annotate_extra + 'press_date')
+        return o.order_by(start_date_field, press_date_field)
 
 
 def _prods_one_way(fltr, object, sort_order):

profiles/views.py

@@ -6,8 +6,9 @@
 from django.contrib.auth.views import LoginView as DjangoLoginView
 from django.shortcuts import render
 
-from django.db.models import Q, Min
-from django.db.models.expressions import RawSQL
+from django.db.models import Q, Min, Case, When, F
+from django.db.models.functions import Coalesce
+# from django.db.models.expressions import RawSQL
 from django.contrib.contenttypes.models import ContentType
 from django_comments.models import Comment
 from django.contrib import messages
@@ -17,6 +18,7 @@
 from utils import int_to_base32, base32_to_int
 from reversion.models import Revision
 from .models import User
+from fields import ApproximateDateField
 
 
 @login_required
@@ -47,7 +49,8 @@ def profile(request, username):
         latest.append(versions)
 
     # Min bit isn't needed except to make sure the GROUP BY gets added
-    seen = user.visit_set.annotate(min_press_date=Min('production__place__press_date')).annotate(best_date=RawSQL('MIN(IFNULL(productions_place.press_date, IF(productions_place.end_date!="", productions_place.end_date, productions_place.start_date)))', ())).order_by('-best_date')
+    seen = user.visit_set.annotate(min_press_date=Min('production__place__press_date')).annotate(best_date=Min(Coalesce("production__place__press_date", Case(When(production__place__end_date="", then=F("production__place__start_date")), default=F("production__place__end_date")), output_field=ApproximateDateField()))).order_by('-best_date')
+    # seen = user.visit_set.annotate(min_press_date=Min('production__place__press_date')).annotate(best_date=Min(RawSQL('IFNULL(productions_place.press_date, IF(productions_place.end_date!="", productions_place.end_date, productions_place.start_date))', ()))).order_by('-best_date')
 
     return render(request, 'profile.html', {
         'view': user,