services.py 文件源码

def create_course(*,
                  name: str,
                  start_date: datetime,
                  end_date: datetime,
                  repository: str,
                  facebook_group: str=None,
                  video_channel: str=None,
                  slug_url: str=None,
                  logo: BinaryIO=None,
                  public: bool=True,
                  description: str="") -> Course:

    if Course.objects.filter(name=name).exists():
        raise ValidationError('Course already exists')

    course = Course.objects.create(
        name=name,
        start_date=start_date,
        end_date=end_date,
        repository=repository,
        facebook_group=facebook_group,
        video_channel=video_channel,
        slug_url=slug_url,
        logo=logo,
        public=public
    )

    weeks = course.duration_in_weeks
    start_date = course.start_date
    start_date = start_date - timedelta(days=start_date.weekday())

    week_instances = []
    for i in range(1, weeks + 1):
        current = Week(course=course,
                       number=i,
                       start_date=start_date,
                       end_date=start_date + timedelta(days=7))
        start_date = current.end_date
        week_instances.append(current)

    Week.objects.bulk_create(week_instances)
    CourseDescription.objects.create(course=course, verbose=description)

    return course