Prevent instructors from accidentally downgrading enrollment modes through instructor dash TNL-804

lms/djangoapps/instructor/enrollment.py

@@ -26,9 +26,12 @@ class EmailEnrollmentState(object):
         exists_user = User.objects.filter(email=email).exists()
         if exists_user:
             user = User.objects.get(email=email)
-            exists_ce = CourseEnrollment.is_enrolled(user, course_id)
+            mode, is_active = CourseEnrollment.enrollment_mode_for_user(user, course_id)
+            # is_active is `None` if the user is not enrolled in the course
+            exists_ce = is_active is not None and is_active
             full_name = user.profile.name
         else:
+            mode = None
             exists_ce = False
             full_name = None
         ceas = CourseEnrollmentAllowed.objects.filter(course_id=course_id, email=email).all()
@@ -40,6 +43,7 @@ class EmailEnrollmentState(object):
         self.allowed = exists_allowed
         self.auto_enroll = bool(state_auto_enroll)
         self.full_name = full_name
+        self.mode = mode
 
     def __repr__(self):
         return "{}(user={}, enrollment={}, allowed={}, auto_enroll={})".format(
@@ -84,7 +88,7 @@ def enroll_email(course_id, student_email, auto_enroll=False, email_students=Fal
     previous_state = EmailEnrollmentState(course_id, student_email)
 
     if previous_state.user:
-        CourseEnrollment.enroll_by_email(student_email, course_id)
+        CourseEnrollment.enroll_by_email(student_email, course_id, previous_state.mode)
         if email_students:
             email_params['message'] = 'enrolled_enroll'
             email_params['email_address'] = student_email

lms/djangoapps/instructor/tests/test_api.py

@@ -1050,6 +1050,38 @@ class TestInstructorAPIEnrollment(ModuleStoreTestCase, LoginEnrollmentTestCase):
             )
         )
 
+    def test_enroll_already_enrolled_student(self):
+        """
+        Ensure that already enrolled "verified" students cannot be downgraded
+        to "honor"
+        """
+        course_enrollment = CourseEnrollment.objects.get(
+            user=self.enrolled_student, course_id=self.course.id
+        )
+        # make this enrollment "verified"
+        course_enrollment.mode = u'verified'
+        course_enrollment.save()
+        self.assertEqual(course_enrollment.mode, u'verified')
+
+        # now re-enroll the student through the instructor dash
+        url = reverse(
+            'students_update_enrollment',
+            kwargs={'course_id': self.course.id.to_deprecated_string()},
+        )
+        params = {
+            'identifiers': self.enrolled_student.email,
+            'action': 'enroll',
+            'email_students': True,
+        }
+        response = self.client.post(url, params)
+        self.assertEqual(response.status_code, 200)
+
+        # affirm that the student is still in "verified" mode
+        course_enrollment = CourseEnrollment.objects.get(
+            user=self.enrolled_student, course_id=self.course.id
+        )
+        self.assertEqual(course_enrollment.mode, u"verified")
+
 
 @ddt.ddt
 @override_settings(MODULESTORE=TEST_DATA_MONGO_MODULESTORE)

lms/templates/courseware/instructor_dashboard.html

@@ -192,10 +192,8 @@ function goto( mode)
       <div class="copy">
         <p>
           ${_("Note: some of these buttons are known to time out for larger "
-              "courses. We have temporarily disabled those features for courses "
-              "with more than {max_enrollment} students. We are urgently working on "
-              "fixing this issue. Thank you for your patience as we continue "
-              "working to improve the platform!").format(
+              "courses. We have disabled those features for courses "
+              "with more than {max_enrollment} students.").format(
               max_enrollment=settings.FEATURES['MAX_ENROLLMENT_INSTR_BUTTONS']
             )}
         </p>
@@ -428,10 +426,8 @@ function goto( mode)
       <div class="copy">
         <p>
           ${_("Note: some of these buttons are known to time out for larger "
-              "courses. We have temporarily disabled those features for courses "
-              "with more than {max_enrollment} students. We are urgently working on "
-              "fixing this issue. Thank you for your patience as we continue "
-              "working to improve the platform!").format(
+              "courses. We have disabled those features for courses "
+              "with more than {max_enrollment} students.").format(
               max_enrollment=settings.FEATURES['MAX_ENROLLMENT_INSTR_BUTTONS']
             )}
         </p>
@@ -461,17 +457,6 @@ function goto( mode)
     <hr width="40%" style="align:left">
 
   %endif
-  <h2>${_("Batch Enrollment")}</h2>
-  <p>${_("Enroll or un-enroll one or many students: enter emails, separated by new lines or commas;")}</p>
-  <textarea rows="6" cols="70" name="multiple_students"></textarea>
-  <p>
-  <input type="checkbox" name="email_students"> ${_("Notify students by email")}
-  <p>
-  <input type="checkbox" name="auto_enroll"> ${_("Auto-enroll students when they activate")}
-  <input type="submit" name="action" value="Enroll multiple students">
-  <p>
-  <input type="submit" name="action" value="Unenroll multiple students">
-
 %endif
 
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