Configure Open Response Assessment

Adding ORA component to a Unit

ORA is enabled in Ironwood by default.

1. Go to the specific unit > Click Problem > Click Advanced > Open Response Assessment.
2. Now edit the component > Click Settings > File Uploads Response > Set to ‘Required’.
3. Now upload file either in LMS or CMS, it will throw error.

For this error to resolve, you need to implement Storage Back-end mechanism (i.e S3, local filesystem etc). Here in this tutorial, we will walkthrough the configuration need to implement local filesystem back-end and storage.

Configuring Local FileSystem Back-end and Storage

1. Make a new directory.

   mkdir /edx/var/edxapp/ora_uploads
   sudo chown www-data:edxapp /edx/var/edxapp/ora_uploads   # Change ownership
   

2. Open files lms/envs/common.py and cms/envs/common.py on your favourite editor (eg: nano) and configure some keys.

   ORA2_FILEUPLOAD_BACKEND = "filesystem"
   ORA2_FILEUPLOAD_CACHE_NAME="ora2-storage"
   ORA2_FILEUPLOAD_ROOT = "/edx/var/edxapp/ora_uploads"
   

3. Open files lms.env.json and cms.env.json. After that add the following settings.

   # Add this to CACHE key
           "ora2-storage": {
               "BACKEND": "django.core.cache.backends.memcached.MemcachedCache",
               "KEY_FUNCTION": "util.memcache.safe_key",
               "LOCATION": [
                   "localhost:11211"
               ]
           }
   # Replace the key
   "FILE_UPLOAD_STORAGE_BUCKET_NAME": "ORA_SUBMISSIONS"
   

4. Open the file /edx/app/edxapp/venvs/edxapp/lib/python2.7/site-packages/openassessment/fileupload/backends/filesystem.py and add this function.

   from django.core.urlresolvers import reverse_lazy, reverse
   
       def _get_url(self, key):
           key_name = self._get_key_name(key)
           # Change reverse_lazy to reverse
           url = reverse("openassessment-filesystem-storage", kwargs={'key': key_name})
           return url
   

5. Open the file cms/urls.py

   # Adding upload url
   url(r'^openassessment/storage', include(openassessment.fileupload.urls))
   

6. Restart the LMS and Studio for the changes to take effect.

   sudo /edx/bin/supervisorctl restart lms cms