Fixed bug for courses without an honor mode

lms/djangoapps/commerce/constants.py

@@ -19,3 +19,4 @@ class Messages(object):
     NO_SKU_ENROLLED = u'The {enrollment_mode} mode for {course_id} does not have a SKU. Enrolling {username} directly.'
     ORDER_COMPLETED = u'Order {order_number} was completed.'
     ORDER_INCOMPLETE_ENROLLED = u'Order {order_number} was created, but is not yet complete. User was enrolled.'
+    NO_HONOR_MODE = u'Course {course_id} does not have an honor mode.'

lms/djangoapps/commerce/tests.py

@@ -237,7 +237,6 @@ class OrdersViewTests(ModuleStoreTestCase):
         response = self._post_to_view()
 
         # Validate the response
-        self._mock_ecommerce_api()
         self.assertEqual(response.status_code, 200)
         msg = Messages.NO_ECOM_API.format(username=self.user.username, course_id=self.course.id)
         self.assertResponseMessage(response, msg)
@@ -245,3 +244,29 @@ class OrdersViewTests(ModuleStoreTestCase):
         # Ensure that the user is not enrolled and that no calls were made to the E-Commerce API
         self.assertTrue(CourseEnrollment.is_enrolled(self.user, self.course.id))
         self.assertIsInstance(httpretty.last_request(), HTTPrettyRequestEmpty)
+
+    def _test_professional_mode_only(self):
+        """ Verifies that the view behaves appropriately when the course only has a professional mode. """
+        CourseMode.objects.filter(course_id=self.course.id).delete()
+        mode = 'no-id-professional'
+        CourseModeFactory.create(course_id=self.course.id, mode_slug=mode, mode_display_name=mode,
+                                 sku=uuid4().hex.decode('ascii'))
+        self._mock_ecommerce_api()
+        response = self._post_to_view()
+        self.assertEqual(response.status_code, 406)
+        msg = Messages.NO_HONOR_MODE.format(course_id=self.course.id)
+        self.assertResponseMessage(response, msg)
+
+    @httpretty.activate
+    def test_course_with_professional_mode_only(self):
+        """ Verifies that the view behaves appropriately when the course only has a professional mode. """
+        self._test_professional_mode_only()
+
+    @httpretty.activate
+    @override_settings(ECOMMERCE_API_URL=None, ECOMMERCE_API_SIGNING_KEY=None)
+    def test_no_settings_and_professional_mode_only(self):
+        """
+        Verifies that the view behaves appropriately when the course only has a professional mode and
+        the E-Commerce API is not configured.
+        """
+        self._test_professional_mode_only()

lms/djangoapps/commerce/views.py

@@ -79,28 +79,33 @@ class OrdersView(APIView):
         if not valid:
             return DetailResponse(error, status=HTTP_406_NOT_ACCEPTABLE)
 
+        # Ensure that the course has an honor mode with SKU
+        honor_mode = CourseMode.mode_for_course(course_key, CourseMode.HONOR)
+        course_id = unicode(course_key)
+
+        # If there is no honor course mode, this most likely a Prof-Ed course. Return an error so that the JS
+        # redirects to track selection.
+        if not honor_mode:
+            msg = Messages.NO_HONOR_MODE.format(course_id=course_id)
+            return DetailResponse(msg, status=HTTP_406_NOT_ACCEPTABLE)
+        elif not honor_mode.sku:
+            # If there are no course modes with SKUs, enroll the user without contacting the external API.
+            msg = Messages.NO_SKU_ENROLLED.format(enrollment_mode=CourseMode.HONOR, course_id=course_id,
+                                                  username=user.username)
+            log.debug(msg)
+            self._enroll(course_key, user)
+            return DetailResponse(msg)
+
         # Ensure that the E-Commerce API is setup properly
         ecommerce_api_url = getattr(settings, 'ECOMMERCE_API_URL', None)
         ecommerce_api_signing_key = getattr(settings, 'ECOMMERCE_API_SIGNING_KEY', None)
 
         if not (ecommerce_api_url and ecommerce_api_signing_key):
             self._enroll(course_key, user)
-            msg = Messages.NO_ECOM_API.format(username=user.username, course_id=unicode(course_key))
+            msg = Messages.NO_ECOM_API.format(username=user.username, course_id=course_id)
             log.debug(msg)
             return DetailResponse(msg)
 
-        # Default to honor mode. In the future we may expand this view to support additional modes.
-        mode = CourseMode.DEFAULT_MODE_SLUG
-        course_modes = CourseMode.objects.filter(course_id=course_key, mode_slug=mode, sku__isnull=False)
-
-        # If there are no course modes with SKUs, enroll the user without contacting the external API.
-        if not course_modes.exists():
-            msg = Messages.NO_SKU_ENROLLED.format(enrollment_mode=mode, course_id=unicode(course_key),
-                                                  username=user.username)
-            log.debug(msg)
-            self._enroll(course_key, user)
-            return DetailResponse(msg)
-
         # Contact external API
         headers = {
             'Content-Type': 'application/json',
@@ -111,7 +116,7 @@ class OrdersView(APIView):
 
         try:
             timeout = getattr(settings, 'ECOMMERCE_API_TIMEOUT', 5)
-            response = requests.post(url, data=json.dumps({'sku': course_modes[0].sku}), headers=headers,
+            response = requests.post(url, data=json.dumps({'sku': honor_mode.sku}), headers=headers,
                                      timeout=timeout)
         except Exception as ex:  # pylint: disable=broad-except
             log.exception('Call to E-Commerce API failed: %s.', ex.message)
@@ -143,7 +148,7 @@ class OrdersView(APIView):
                     'status': order_status,
                     'complete_status': OrderStatus.COMPLETE,
                     'username': user.username,
-                    'course_id': unicode(course_key),
+                    'course_id': course_id,
                 }
                 log.error(msg, msg_kwargs)