Sensbile string representation

bikeshop_project/core/models.py

@@ -69,3 +69,7 @@ class Visit(models.Model):
     )
     created_at = models.DateTimeField(auto_now_add=True)
     purpose = models.CharField(max_length=50, choices=visit_choices)
+
+    def __str__(self):
+        return '<Visit purpose: {purpose} created_at: {created_at}>'.format(purpose=self.purpose,
+                                                                            created_at=self.created_at.isoformat())