Middleware: Only warn when settings.DEBUG is True

tos/models.py

@@ -1,3 +1,5 @@
+import warnings
+
 from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.db import models
@@ -21,9 +23,12 @@ def get_current_tos(self):
         try:
             return self.get(active=True)
         except self.model.DoesNotExist:
-            raise NoActiveTermsOfService(
-                'Please create an active Terms-of-Service'
-            )
+            if settings.DEBUG:
+                warnings.warn("There is no active Terms-of-Service")
+            else:
+                raise NoActiveTermsOfService(
+                    'Please create an active Terms-of-Service'
+                )
 
 
 class TermsOfService(BaseModel):
@@ -60,9 +65,12 @@ def save(self, *args, **kwargs):
                     .exclude(id=self.id)\
                     .filter(active=True)\
                     .exists():
-                raise NoActiveTermsOfService(
-                    'One of the terms of service must be marked active'
-                )
+                if settings.DEBUG:
+                    warnings.warn("There is no active Terms-of-Service")
+                else:
+                    raise NoActiveTermsOfService(
+                        'One of the terms of service must be marked active'
+                    )
 
         super().save(*args, **kwargs)
 

tos/tests/test_models.py

@@ -1,6 +1,6 @@
 from django.contrib.auth import get_user_model
 from django.core.exceptions import ValidationError
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from tos.models import (
     NoActiveTermsOfService,
@@ -104,3 +104,39 @@ def test_terms_of_service_manager(self):
     def test_terms_of_service_manager_raises_error(self):
 
         self.assertRaises(NoActiveTermsOfService, TermsOfService.objects.get_current_tos)
+
+
+class TestNoActiveTOS(TestCase):
+    @classmethod
+    def setUpClass(cls):
+        # Use bulk_create to avoid calling the model's save() method
+        TermsOfService.objects.bulk_create([
+            TermsOfService(
+                content="The only TOS",
+                active=False,
+            )
+        ])
+
+    @classmethod
+    def tearDownClass(cls):
+        TermsOfService.objects.all().delete()
+
+    @override_settings(DEBUG=True)
+    def test_model_save_raises_warning(self):
+        with self.assertWarns(Warning):
+            TermsOfService.objects.first().save()
+
+    @override_settings(DEBUG=True)
+    def test_get_current_tos_raises_warning(self):
+        with self.assertWarns(Warning):
+            TermsOfService.objects.get_current_tos()
+
+    @override_settings(DEBUG=False)
+    def test_model_save_raises_exception(self):
+        with self.assertRaises(NoActiveTermsOfService):
+            TermsOfService.objects.first().save()
+
+    @override_settings(DEBUG=False)
+    def test_get_current_tos_raises_exception(self):
+        with self.assertRaises(NoActiveTermsOfService):
+            TermsOfService.objects.get_current_tos()