def get(self, request, course_id):
course = Course.objects.get(id=course_id)
course.students += 1
user_courses = UserCourse.objects.filter(course=course)
user_ids = [user_course.user.id for user_course in user_courses]
all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
course_ids = [user_course.course.id for user_course in all_user_courses]
related_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")
all_lessons = course.get_course_lessons()
all_resources = CourseResource.objects.filter(course=course)
if not UserCourse.objects.filter(course=course, user=request.user):
user_course = UserCourse()
user_course.user = request.user
user_course.course = course
user_course.save()
return render(request, "course-video.html", {
"course": course,
"all_lessons": all_lessons,
"all_resources": all_resources,
"related_courses": related_courses,
})
def post(self, request):
# 获取课程的 id
course_id = request.POST.get('course_id', '')
# 判断用户登录状态
if not request.user.is_authenticated:
return JsonResponse({'status': 'fail', 'msg': u'用户未登录'})
# 判断用户是否已经处于学习状态
user_course = UserCourse.objects.filter(user_id=request.user.id,
course_id=course_id)
if user_course:
return JsonResponse({'status': 'success', 'msg': u'已添加学习'})
else:
user_course = UserCourse()
# 实例化一个课程对象
course = Course.objects.get(id=course_id)
user_course.course = course
user_course.user = request.user
user_course.save()
# 点击学习，学习人数加 1
course.student_number += 1
course.save()
# 课程机构的学习人加 1
org = course.course_teacher.organization
org.students += 1
org.save()
# 用户添加学习时，发送消息给用户
user_message = UserMessage()
user_message.user = request.user.id
user_message.message = '欢迎你学习<{}>这门课程\n{}'.format(
course.course_name, course.description)
user_message.save()
return JsonResponse({'status': 'success', 'msg': u'已添加学习'})