Fix migrations for trashbin feature

dav_registration/models.py

@@ -72,7 +72,7 @@ class Registration(models.Model):
                                                   verbose_name=_('Einwilligung zur Datenspeicherung'))
     purge_at = models.DateTimeField(_('Zeitpunkt der Datenlöschung'))
 
-    answered_2migrate = models.BooleanField(default=False, verbose_name=_('Durch Tourleitung beantwortet'))
+    answered_obsolete = models.BooleanField(default=False, verbose_name=_('Durch Tourleitung beantwortet'))
 
     @staticmethod
     def pk2hexstr(pk):
@@ -156,24 +156,6 @@ Anmerkung:
             logger.info('Registration stored: %s', self)
             signals.registration_created.send(sender=self.__class__, registration=self)
 
-    def answered(self, accepted):
-        if accepted is not True and accepted is not False:
-            raise ValueError('boolean parameter expected')
-        if hasattr(self, 'status'):
-            status = self.status
-        else:
-            status = RegistrationStatus(registration=self)
-
-        status.accepted = accepted
-        status.answered = True
-        status.save()
-
-    def accepted(self):
-        return self.answered(accepted=True)
-
-    def rejected(self):
-        return self.answered(accepted=False)
-
     @classmethod
     def calc_purge_at(cls, event):
         if event.alt_last_day:
@@ -217,11 +199,24 @@ class RegistrationStatus(models.Model):
         return '{} (Updated: {})'.format(self.registration, self.updated_at.strftime('%d.%m.%Y %H:%M:%S'))
 
     def clean(self):
-        if self.answered and self.accepted is None:
-            raise ValidationError({'accepted': 'if answered is true, accepted must not be none'})
-        elif not self.answered and self.accepted is not None:
-            raise ValidationError({'answered': 'if answered is false, accepted must be none'})
+        if self.accepted is not None and self.answered is not True:
+            raise ValidationError({'answered': 'if accepted is not None, answered must be True'})
 
     def save(self, **kwargs):
         self.full_clean()
         super(RegistrationStatus, self).save(**kwargs)
+
+    def set_accepted(self):
+        self.accepted = True
+        self.answered = True
+        self.save()
+
+    def set_rejected(self):
+        self.accepted = False
+        self.answered = True
+        self.save()
+
+    def reset(self):
+        self.accepted = None
+        self.answered = False
+        self.save()