old_contents: from django.shortcuts import render, get_object_or_404
  from django.utils import timezone
  from .models import Post
  from .forms import PostForm
  
  # Create your views here.
  def post_list(request):
      posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
      return render(request, 'blog/post_list.html', {'posts': posts})
  
  def post_detail(request, pk):
      post = get_object_or_404(Post, pk=pk)
      return render(request, 'blog/post_detail.html', {'post': post})
  
  def post_new(request, pk):
      post = get_object_or_404(Post, pk=pk)
      if request.method == "POST":
          form = PostForm(request.POST, instance=post)
          if form.is_valid():
              post = form.save(commit=False)
              post.author = request.user
              post.published_date = timezone.now()
              post.save()
              return redirect('blog.views.post_detail', pk=post.pk)
      else:
          form = PostForm(instance=post)
      return render(request, 'blog/post_edit.html', {'form': form})
  
new_contents: from django.shortcuts import render, get_object_or_404
  from django.utils import timezone
  from .models import Post
  from .forms import PostForm
  
  # Create your views here.
  def post_list(request):
      posts = Post.objects.filter(published_date__lte=timezone.now()).order_by('published_date')
      return render(request, 'blog/post_list.html', {'posts': posts})
  
  def post_detail(request, pk):
      post = get_object_or_404(Post, pk=pk)
      return render(request, 'blog/post_detail.html', {'post': post})
  
  def post_new(request):
      if request.method == "POST":
          form = PostForm(request.POST)
          if form.is_valid():
              post = form.save(commit=False)
              post.author = request.user
              post.published_date = timezone.now()
              post.save()
              return redirect('blog.views.post_detail', pk=post.pk)
      else:
          form = PostForm()
      return render(request, 'blog/post_edit.html', {'form': form})
      
  def post_edit(request, pk):
      post = get_object_or_404(Post, pk=pk)
      if request.method == "POST":
          form = PostForm(request.POST, instance=post)
          if form.is_valid():
              post = form.save(commit=False)
              post.author = request.user
              post.published_date = timezone.now()
              post.save()
              return redirect('blog.views.post_detail', pk=post.pk)
      else:
          form = PostForm(instance=post)
      return render(request, 'blog/post_edit.html', {'form': form})
  
subject: fix edit view