Refs #126 -- Show order history

src/pretix/base/models/base.py

@@ -33,7 +33,6 @@ def cached_file_delete(sender, instance, **kwargs):
 
 
 class LoggingMixin:
-    logentries = GenericRelation('LogEntry')
 
     def log_action(self, action, data=None, user=None):
         """
@@ -59,6 +58,10 @@ class LoggingMixin:
 
 
 class LoggedModel(models.Model, LoggingMixin):
+    logentries = GenericRelation('LogEntry')
 
     class Meta:
         abstract = True
+
+    def all_logentries(self):
+        return self.logentries.all().select_related('user')

src/pretix/base/models/log.py

@@ -28,3 +28,14 @@ class LogEntry(models.Model):
     event = models.ForeignKey('Event', null=True, blank=True, on_delete=models.CASCADE)
     action_type = models.CharField(max_length=255)
     data = models.TextField(default='{}')
+
+    class Meta:
+        ordering = ('-datetime', )
+
+    def display(self):
+        from ..signals import logentry_display
+
+        for receiver, response in logentry_display.send(self.event, logentry=self):
+            if response:
+                return response
+        return self.action_type

src/pretix/base/signals.py

@@ -87,3 +87,11 @@ as the first argument.
 order_paid = EventPluginSignal(
     providing_args=["order"]
 )
+
+"""
+This signal is sent out every time we need to display a LogEntry object and we
+don't know how to turn it into human-readable text.
+"""
+logentry_display = EventPluginSignal(
+    providing_args=["logentry"]
+)