Cleaned up Transaction save/delete

k4ever/transaction/admin.py

@@ -4,28 +4,13 @@ from django.contrib import admin
 
 class TransactionAdmin(admin.ModelAdmin):
 	list_filter = ('transactionType','checked','user')
-	actions = ['really_delete_selected']
+	#actions = ['really_delete_selected']
 	list_display = ('user', 'transactionType', 'amount', 'dateTime', 'checked')
 	list_display_links = ('user', 'transactionType')
 	search_fields = ['user__username','user__first_name','user__last_name']
 	date_hierarchy = 'dateTime'
 	ordering = ['-dateTime']
 
-	def get_actions(self, request):
-		actions = super(TransactionAdmin, self).get_actions(request)
-		del actions['delete_selected']
-		return actions
-	# FIXME: Can we instead of replacing the whole page just
-	#        hook the release process? Also - make this nicer
-	#        in terms of localization/naming foo
-	def really_delete_selected(self, request, queryset):
-		for obj in queryset:
-			obj.delete()
-		num = queryset.count()
-		message = "%s Transaktion%s" % (num, (num != 1 and "en" or ""))
-		self.message_user(request, u"Erfolgreich %s gelöscht." % message)
-	really_delete_selected.short_description = u"Ausgewählte Transaktion(en) löschen"
-
 class VirtualTransactionAdmin(admin.ModelAdmin):
 	list_display = ('user','recipient','amount','dateTime','comment')
 	list_display_links = ('user','recipient')

k4ever/transaction/models.py

@@ -29,6 +29,7 @@ class Transaction(models.Model):
 	
 	def __unicode__(self):
 		return u"%s for user %s (%s),%schecked" % (self.amount, self.user, self.transactionType, (self.checked and " " or " not "))
+	
 	# TODO: Find out what would happen if parent save/delete does not like us
 	def save(self, *args, **kwargs):
 		profile = self.user.get_profile()
@@ -38,14 +39,25 @@ class Transaction(models.Model):
 		else:
 			# update
 			oldobj = Transaction.objects.get(id=self.id)
+			if oldobj.user != self.user:
+				oldprofile = oldobj.user.get_profile()
+				oldprofile.balance -= oldobj.amount
+				oldprofile.save()
+				# just to be save, reget profile
+				profile = self.user.get_profile()
+				profile.balance += self.amount
+			else:
 				profile.balance += (self.amount-oldobj.amount)
 		profile.save()
 		super(Transaction, self).save(*args, **kwargs)
-	def delete(self, *args, **kwargs):
-		profile = self.user.get_profile()
-		profile.balance -= self.amount
+	
+	@staticmethod
+	def pre_delete_signal(sender, instance, **kwargs):
+		profile = instance.user.get_profile()
+		profile.balance -= instance.amount
 		profile.save()
-		super(Transaction, self).delete(*args, **kwargs)
+		
+pre_delete.connect(Transaction.pre_delete_signal, sender=Transaction)
 
 class VirtualTransaction(models.Model):
 	""" Represents a transaction between two users. """