old_contents: from django.shortcuts import render, redirect, get_object_or_404
  from django.urls import reverse
  from mainmodels.models import Category, Course, CourseInCategory
  from django.contrib.auth.models import User
  # Create your views here.
  def createCourse(req):
      if req.method == 'POST':
          try:
              courseName = req.POST['courseName']
              courseCategory = req.POST['courseCategory']
              courseDesc = req.POST['courseDesc']
              courseThumbnail = req.FILES['courseThumbnail']
              coursePrice = req.POST['coursePrice']
              owner = User.objects.get(username='nut')
  
              newCourse = Course(courseName=courseName, courseDesc=courseDesc,courseThumbnail=courseThumbnail, owner=owner, coursePrice=coursePrice, isDelete=False)
              newCourse.save()
  
              category = Category.objects.get(categoryID=courseCategory)
              newCourseCategory = CourseInCategory(category=category, course=newCourse)
              newCourseCategory.save()
  
              return render(req, 'course/createCourse.html', {'courseCategory':courseCategory, 'success': True, 'message': 'Create course successfully.'})
          except:
              return render(req, 'course/createCourse.html', {'courseCategory':courseCategory, 'success': False, 'message': 'Create course failed.'})
      else:
          courseCategory = Category.objects.all()
          return render(req, 'course/createCourse.html', {'courseCategory':courseCategory})
  
new_contents: from django.shortcuts import render, redirect, get_object_or_404
  from django.urls import reverse
  from mainmodels.models import Category, Course, CourseInCategory
  # Create your views here.
  def createCourse(req):
      if req.method == 'POST':
          try:
              courseName = req.POST['courseName']
              courseCategory = req.POST['courseCategory']
              courseDesc = req.POST['courseDesc']
              courseThumbnail = req.FILES['courseThumbnail']
              coursePrice = req.POST['coursePrice']
              owner = req.user
  
              newCourse = Course(courseName=courseName, courseDesc=courseDesc,courseThumbnail=courseThumbnail, owner=owner, coursePrice=coursePrice, isDelete=False)
              newCourse.save()
  
              category = Category.objects.get(categoryID=courseCategory)
              newCourseCategory = CourseInCategory(category=category, course=newCourse)
              newCourseCategory.save()
  
              return render(req, 'course/createCourse.html', {'courseCategory':courseCategory, 'success': True, 'message': 'Create course successfully.'})
          except:
              return render(req, 'course/createCourse.html', {'courseCategory':courseCategory, 'success': False, 'message': 'Create course failed.'})
      else:
          courseCategory = Category.objects.all()
          return render(req, 'course/createCourse.html', {'courseCategory':courseCategory})
  
subject: Remove fixed owner and make loged in user instead