Add a kind of trashbin for registrations and participants

dav_events/models/participant.py

@@ -13,12 +13,7 @@ midnight = datetime.time(00, 00, 00)
 
 
 @python_2_unicode_compatible
-class Participant(models.Model):
-    event = models.ForeignKey('Event', related_name='participants')
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    position = models.IntegerField(verbose_name='Listennummer')
-
+class AbstractParticipant(models.Model):
     personal_names = models.CharField(max_length=1024,
                                       verbose_name=_('Vorname(n)'))
     family_names = models.CharField(max_length=1024,
@@ -54,17 +49,10 @@ class Participant(models.Model):
     purge_at = models.DateTimeField()
 
     class Meta:
-        unique_together = (('event', 'position'), )
-        verbose_name = _('Teilnehmer')
-        verbose_name_plural = _('Teilnehmer')
-        ordering = ['event', 'position']
+        abstract = True
 
     def __str__(self):
-        return '{eventnumber} - {position}. {name}'.format(
-            eventnumber=self.event.get_number(),
-            position=self.position,
-            name=self.get_full_name(),
-        )
+        return self.get_full_name()
 
     def get_full_name(self):
         return '{} {}'.format(self.personal_names, self.family_names)
@@ -96,6 +84,12 @@ class Participant(models.Model):
                 note=self.note,
             )
 
+    def get_data_dict(self):
+        data = {}
+        for field in self._meta.fields:
+            data[field.name] = getattr(self, field.name)
+        return data
+
     def clean(self):
         if self.dav_member and not self.dav_number:
             raise ValidationError({'dav_number': _('Bei DAV Mitgliedern brauchen wir die Mitgliedsnummer.')})
@@ -105,7 +99,7 @@ class Participant(models.Model):
             self.purge_at = self.__class__.calc_purge_at(self.event)
 
         self.full_clean()
-        super(Participant, self).save(**kwargs)
+        super(AbstractParticipant, self).save(**kwargs)
 
     @staticmethod
     def calc_purge_at(event):
@@ -132,3 +126,23 @@ class Participant(models.Model):
             purge_date = july_nextyear
 
         return timezone.make_aware(datetime.datetime.combine(purge_date, midnight))
+
+
+@python_2_unicode_compatible
+class Participant(AbstractParticipant):
+    event = models.ForeignKey('Event', related_name='participants')
+    created_at = models.DateTimeField(auto_now_add=True)
+    position = models.IntegerField(verbose_name='Listennummer')
+
+    class Meta:
+        verbose_name = _('Teilnehmer')
+        verbose_name_plural = _('Teilnehmer')
+        unique_together = (('event', 'position'), )
+        ordering = ['event', 'position']
+
+    def __str__(self):
+        return '{eventnumber} - {position}. {name}'.format(
+            eventnumber=self.event.get_number(),
+            position=self.position,
+            name=self.get_full_name(),
+        )