From 03ca65602fd2e41a6556473820fa493c774e97c6 Mon Sep 17 00:00:00 2001
From: David Taylor <david@taylorhq.com>
Date: Tue, 5 Apr 2016 12:08:19 +0100
Subject: [PATCH] Allow sorting by number of events

---
 RIGS/admin.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/RIGS/admin.py b/RIGS/admin.py
index d8583e23..9bfcb3eb 100644
--- a/RIGS/admin.py
+++ b/RIGS/admin.py
@@ -9,6 +9,7 @@ from django.template.response import TemplateResponse
 from django.contrib import messages 
 from django.db import transaction
 from django.core.exceptions import ObjectDoesNotExist
+from django.db.models import Count
 
 # Register your models here.
 admin.site.register(models.VatRate, reversion.VersionAdmin)
@@ -44,9 +45,14 @@ class AssociateAdmin(reversion.VersionAdmin):
 
     actions = ['merge']
 
+    def get_queryset(self, request):
+        return super(AssociateAdmin, self).get_queryset(request).annotate(event_count = Count('event'))
+
     def number_of_events(self,obj):
         return obj.latest_events.count()
 
+    number_of_events.admin_order_field = 'event_count'
+
     def merge(self, request, queryset):
         if request.POST.get('post'): # Has the user confirmed which is the master record?
             try: