Add basic counter model

counter/models.py

@@ -0,0 +1,22 @@
+from django.db import models
+from django.utils.translation import ugettext_lazy as _
+from django.conf import settings
+
+from club.models import Club
+from accounting.models import Product
+from core.models import Group
+
+class Counter(models.Model):
+    name = models.CharField(_('name'), max_length=30)
+    club = models.ForeignKey(Club, related_name="counters")
+    products = models.ManyToManyField(Product, related_name="counters", blank=True)
+    edit_groups = models.ManyToManyField(Group, related_name="editable_counters", blank=True)
+    view_groups = models.ManyToManyField(Group, related_name="viewable_counters", blank=True)
+
+    def __getattribute__(self, name):
+        if name == "owner_group":
+            return Group(name=self.club.unix_name+"-board")
+        return object.__getattribute__(self, name)
+
+    def __str__(self):
+        return self.name