Merge pull request #4075 from edx/han/regenerate_user

Transition to Oqaque Keys

lms/djangoapps/certificates/management/commands/regenerate_user.py

 """Django management command to force certificate regeneration for one user"""
 
 from optparse import make_option
-
 from django.contrib.auth.models import User
 from django.core.management.base import BaseCommand, CommandError
-
-from certificates.queue import XQueueCertInterface
+from opaque_keys import InvalidKeyError
+from opaque_keys.edx.keys import CourseKey
+from opaque_keys.edx.locations import SlashSeparatedCourseKey
 from xmodule.course_module import CourseDescriptor
 from xmodule.modulestore.django import modulestore
+from certificates.queue import XQueueCertInterface
 
 
 class Command(BaseCommand):
@@ -48,9 +49,17 @@ class Command(BaseCommand):
     )
 
     def handle(self, *args, **options):
+        if options['course']:
+            # try to parse out the course from the serialized form
+            try:
+                course_id = CourseKey.from_string(options['course'])
+            except InvalidKeyError:
+                print("Course id {} could not be parsed as a CourseKey; falling back to SSCK.from_dep_str".format(options['course']))
+                course_id = SlashSeparatedCourseKey.from_deprecated_string(options['course'])
+        else:
+            raise CommandError("You must specify a course")
 
         user = options['username']
-        course_id = options['course']
         if not (course_id and user):
             raise CommandError('both course id and student username are required')