Fixes some stuff in metrics tab

  Fixes some 500s after opaque-keys
  Adds a test which would have caught the 500s
  Fixes Transifex problem on the string % of students

lms/djangoapps/class_dashboard/dashboard_data.py

@@ -558,7 +558,7 @@ def post_metrics_data_csv(request):
         header = [_("Section").encode('utf-8'), _("Subsection").encode('utf-8'), _("Opened by this number of students").encode('utf-8')]
         filename = sanitize_filename(_('subsections') + '_' + course_id)
     elif data_type == 'problem':
-        header = [_("Section").encode('utf-8'), _("Problem").encode('utf-8'), _("Name").encode('utf-8'), _("Count of Students").encode('utf-8'), _("% of Students").encode('utf-8'), _("Score").encode('utf-8')]
+        header = [_("Section").encode('utf-8'), _("Problem").encode('utf-8'), _("Name").encode('utf-8'), _("Count of Students").encode('utf-8'), _("Percent of Students").encode('utf-8'), _("Score").encode('utf-8')]
         filename = sanitize_filename(_('problems') + '_' + course_id)
 
     for index, section in enumerate(sections):

lms/djangoapps/class_dashboard/tests/test_views.py

@@ -2,15 +2,21 @@
 Tests for class dashboard (Metrics tab in instructor dashboard)
 """
 from mock import patch
+from django.test.utils import override_settings
 
 from django.test import TestCase
 from django.test.client import RequestFactory
+from xmodule.modulestore.tests.factories import CourseFactory
+from student.tests.factories import AdminFactory
 from django.utils import simplejson
+from courseware.tests.tests import TEST_DATA_MONGO_MODULESTORE
+from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 
 from class_dashboard import views
 
 
-class TestViews(TestCase):
+@override_settings(MODULESTORE=TEST_DATA_MONGO_MODULESTORE)
+class TestViews(ModuleStoreTestCase):
     """
     Tests related to class_dashboard/views.py
     """
@@ -81,3 +87,18 @@ class TestViews(TestCase):
         response = views.section_problem_grade_distrib(self.request, 'test/test/test', '1')
 
         self.assertEqual("{\"error\": \"Access Denied: User does not have access to this course\'s data\"}", response.content)
+
+    def test_sending_deprecated_id(self):
+
+        course = CourseFactory.create()
+        instructor = AdminFactory.create()
+        self.request.user = instructor
+
+        response = views.all_sequential_open_distrib(self.request, course.id.to_deprecated_string())
+        self.assertEqual('[]', response.content)
+
+        response = views.all_problem_grade_distribution(self.request, course.id.to_deprecated_string())
+        self.assertEqual('[]', response.content)
+
+        response = views.section_problem_grade_distrib(self.request, course.id.to_deprecated_string(), 'no section')
+        self.assertEqual('{"error": "error"}', response.content)

lms/djangoapps/class_dashboard/views.py

@@ -10,6 +10,7 @@ from django.http import HttpResponse
 from courseware.courses import get_course_with_access
 from courseware.access import has_access
 from class_dashboard import dashboard_data
+from xmodule.modulestore.locations import SlashSeparatedCourseKey
 
 log = logging.getLogger(__name__)
 
@@ -37,9 +38,10 @@ def all_sequential_open_distrib(request, course_id):
     json = {}
 
     # Only instructor for this particular course can request this information
-    if has_instructor_access_for_class(request.user, course_id):
+    course_key = SlashSeparatedCourseKey.from_deprecated_string(course_id)
+    if has_instructor_access_for_class(request.user, course_key):
         try:
-            json = dashboard_data.get_d3_sequential_open_distrib(course_id)
+            json = dashboard_data.get_d3_sequential_open_distrib(course_key)
         except Exception as ex:  # pylint: disable=broad-except
             log.error('Generating metrics failed with exception: %s', ex)
             json = {'error': "error"}
@@ -62,9 +64,10 @@ def all_problem_grade_distribution(request, course_id):
     json = {}
 
     # Only instructor for this particular course can request this information
-    if has_instructor_access_for_class(request.user, course_id):
+    course_key = SlashSeparatedCourseKey.from_deprecated_string(course_id)
+    if has_instructor_access_for_class(request.user, course_key):
         try:
-            json = dashboard_data.get_d3_problem_grade_distrib(course_id)
+            json = dashboard_data.get_d3_problem_grade_distrib(course_key)
         except Exception as ex:  # pylint: disable=broad-except
             log.error('Generating metrics failed with exception: %s', ex)
             json = {'error': "error"}
@@ -92,9 +95,10 @@ def section_problem_grade_distrib(request, course_id, section):
     json = {}
 
     # Only instructor for this particular course can request this information
-    if has_instructor_access_for_class(request.user, course_id):
+    course_key = SlashSeparatedCourseKey.from_deprecated_string(course_id)
+    if has_instructor_access_for_class(request.user, course_key):
         try:
-            json = dashboard_data.get_d3_section_grade_distrib(course_id, section)
+            json = dashboard_data.get_d3_section_grade_distrib(course_key, section)
         except Exception as ex:  # pylint: disable=broad-except
             log.error('Generating metrics failed with exception: %s', ex)
             json = {'error': "error"}