alter_data.py 文件源码

def get_past_ungraded_course_run(user=None, course=None, now=None):
    """Loop through past course runs and find one without grade data"""
    past_runs = CourseRun.objects.filter(
        course=course,
        end_date__lt=now,
    ).exclude(end_date=None).order_by('-end_date').all()
    for past_run in past_runs:
        if not (CachedCurrentGradeHandler(user).exists(past_run) or
                FinalGrade.objects.filter(user=user, course_run=past_run).exists()):
            return past_run
    raise CommandError("Can't find past run that isn't already passed/failed for Course '{}'".format(course.title))