Fix

common/lib/xmodule/xmodule/lti_module.py

@@ -143,7 +143,7 @@ class LTIModule(LTIFields, XModule):
             try:
                 lti_id, key, secret = lti_passport.split(':')
             except ValueError:
-                raise Exception('Could not parse LTI passport: {0!r}. \
+                raise LTIError('Could not parse LTI passport: {0!r}. \
                     Should be "id:key:secret" string.'.format(lti_passport))
             if lti_id == self.lti_id:
                 client_key, client_secret = key, secret
@@ -155,7 +155,7 @@ class LTIModule(LTIFields, XModule):
             try:
                 param_name, param_value = custom_parameter.split('=', 1)
             except ValueError:
-                raise Exception('Could not parse custom parameter: {0!r}. \
+                raise LTIError('Could not parse custom parameter: {0!r}. \
                     Should be "x=y" string.'.format(custom_parameter))
 
             # LTI specs:  'custom_' should be prepended before each custom parameter

lms/djangoapps/courseware/features/lti.py

@@ -110,7 +110,7 @@ def add_correct_lti_to_course(_step):
     section_name = chapter_name
     path = "/courses/{org}/{num}/{name}/courseware/{chapter}/{section}".format(
         org=course.org,
-        num=course.num,
+        num=course.number,
         name=course.display_name.replace(' ', '_'),
         chapter=chapter_name,
         section=section_name)
@@ -137,7 +137,7 @@ def add_incorrect_lti_to_course(_step):
     section_name = chapter_name
     path = "/courses/{org}/{num}/{name}/courseware/{chapter}/{section}".format(
         org=course.org,
-        num=course.num,
+        num=course.number,
         name=course.display_name.replace(' ', '_'),
         chapter=chapter_name,
         section=section_name)