old_contents: 
  from django.shortcuts import get_object_or_404
  from django.http import HttpResponse
  from django.utils.safestring import mark_safe
  
  import functools
  import json
  
  def model_view(model):
      def inner(view):
          @functools.wraps(view)
          def new_view(request, pk, **kw):
              obj = get_object_or_404(model, pk=pk)
              return view(request, obj, **kw)
          return new_view
      return inner
  
  def ajax_view(view):
      @functools.wraps(view)
      def new_view(request, **kw):
          response = view(request, **kw)
          if response is None:
              return HttpResponse()
          if not isinstance(response, HttpResponse):
              response = HttpResponse(mark_safe(json.dumps(response)),
                                      content_type="application/json")
          return response
  
      return new_view
  
new_contents: 
  from django.shortcuts import get_object_or_404
  from django.http import HttpResponse
  from django.utils.safestring import mark_safe
  
  import functools
  import json
  
  def model_view(model):
      def inner(view):
          @functools.wraps(view)
          def new_view(request, pk, **kw):
              obj = get_object_or_404(model, pk=pk)
              return view(request, obj, **kw)
          return new_view
      return inner
  
  def dump_json(response, pretty=False):
      if pretty:
          return json.dumps(response, indent=2, sort_keys=True)
      else:
          return json.dumps(response)
  
  def ajax_view(view):
      @functools.wraps(view)
      def new_view(request, **kw):
          pretty = request.GET.get('pretty', False)
  
          response = view(request, **kw)
          if response is None:
              return HttpResponse()
          if not isinstance(response, HttpResponse):
              response = HttpResponse(mark_safe(dump_json(response, pretty)),
                                      content_type="application/json")
          return response
  
      return new_view
  
subject: Add a way to pretty-print JSON