66 lines
2.5 KiB
Python
66 lines
2.5 KiB
Python
"""
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This file contains celery tasks for contentstore views
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"""
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from celery.task import task
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from django.contrib.auth.models import User
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import json
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from xmodule.modulestore.django import modulestore
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from xmodule.course_module import CourseFields
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from xmodule.modulestore.exceptions import DuplicateCourseError, ItemNotFoundError
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from course_action_state.models import CourseRerunState
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from contentstore.utils import initialize_permissions
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from opaque_keys.edx.keys import CourseKey
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@task()
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def rerun_course(source_course_key_string, destination_course_key_string, user_id, fields=None):
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"""
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Reruns a course in a new celery task.
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"""
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try:
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# deserialize the payload
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source_course_key = CourseKey.from_string(source_course_key_string)
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destination_course_key = CourseKey.from_string(destination_course_key_string)
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fields = deserialize_fields(fields) if fields else None
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# use the split modulestore as the store for the rerun course,
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# as the Mongo modulestore doesn't support multiple runs of the same course.
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store = modulestore()
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with store.default_store('split'):
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store.clone_course(source_course_key, destination_course_key, user_id, fields=fields)
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# set initial permissions for the user to access the course.
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initialize_permissions(destination_course_key, User.objects.get(id=user_id))
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# update state: Succeeded
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CourseRerunState.objects.succeeded(course_key=destination_course_key)
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return "succeeded"
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except DuplicateCourseError as exc:
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# do NOT delete the original course, only update the status
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CourseRerunState.objects.failed(course_key=destination_course_key, exception=exc)
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return "duplicate course"
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# catch all exceptions so we can update the state and properly cleanup the course.
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except Exception as exc: # pylint: disable=broad-except
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# update state: Failed
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CourseRerunState.objects.failed(course_key=destination_course_key, exception=exc)
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try:
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# cleanup any remnants of the course
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modulestore().delete_course(destination_course_key, user_id)
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except ItemNotFoundError:
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# it's possible there was an error even before the course module was created
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pass
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return "exception: " + unicode(exc)
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def deserialize_fields(json_fields):
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fields = json.loads(json_fields)
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for field_name, value in fields.iteritems():
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fields[field_name] = getattr(CourseFields, field_name).from_json(value)
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return fields
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