old_contents: """ Signal handler for enabling self-generated certificates by default
  for self-paced courses.
  """
  from celery.task import task
  from django.dispatch.dispatcher import receiver
  
  from certificates.models import CertificateGenerationCourseSetting
  from opaque_keys.edx.keys import CourseKey
  from xmodule.modulestore.django import SignalHandler, modulestore
  
  
  @receiver(SignalHandler.course_published)
  def _listen_for_course_publish(sender, course_key, **kwargs):  # pylint: disable=unused-argument
      """ Catches the signal that a course has been published in Studio and
      enable the self-generated certificates by default for self-paced
      courses.
      """
      enable_self_generated_certs.delay(unicode(course_key))
  
  
  @task()
  def enable_self_generated_certs(course_key):
      """Enable the self-generated certificates by default for self-paced courses."""
      course_key = CourseKey.from_string(course_key)
      course = modulestore().get_course(course_key)
      is_enabled_for_course = CertificateGenerationCourseSetting.is_enabled_for_course(course_key)
      if course.self_paced and not is_enabled_for_course:
          CertificateGenerationCourseSetting.set_enabled_for_course(course_key, True)
  
new_contents: """ Signal handler for enabling self-generated certificates by default
  for self-paced courses.
  """
  from celery.task import task
  from django.dispatch.dispatcher import receiver
  
  from certificates.models import CertificateGenerationCourseSetting
  from opaque_keys.edx.keys import CourseKey
  from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
  from xmodule.modulestore.django import SignalHandler
  
  
  @receiver(SignalHandler.course_published)
  def _listen_for_course_publish(sender, course_key, **kwargs):  # pylint: disable=unused-argument
      """ Catches the signal that a course has been published in Studio and
      enable the self-generated certificates by default for self-paced
      courses.
      """
      enable_self_generated_certs.delay(unicode(course_key))
  
  
  @task()
  def enable_self_generated_certs(course_key):
      """Enable the self-generated certificates by default for self-paced courses."""
      course_key = CourseKey.from_string(course_key)
      course = CourseOverview.get_from_id(course_key)
      is_enabled_for_course = CertificateGenerationCourseSetting.is_enabled_for_course(course_key)
      if course.self_paced and not is_enabled_for_course:
          CertificateGenerationCourseSetting.set_enabled_for_course(course_key, True)
  
subject: Use CourseOverview instead of modulestore.