Add api and audit structure

passbook/audit/models.py

@@ -0,0 +1,22 @@
+"""passbook audit models"""
+
+from django.conf import settings
+from django.db import models
+from reversion import register
+
+from passbook.lib.models import UUIDModel
+
+
+@register()
+class AuditEntry(UUIDModel):
+    """An individual audit log entry"""
+
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, on_delete=models.SET_NULL)
+    action = models.TextField()
+    date = models.DateTimeField(auto_now_add=True)
+    app = models.TextField()
+
+    def save(self, *args, **kwargs):
+        if self.pk:
+            raise NotImplementedError("you may not edit an existing %s" % self._meta.model_name)
+        super().save(*args, **kwargs)