Properties: Dpgstack CBV

• Inherited from View, named after Model: class ThoughtView(View).

• Define class attributes:

  template_name = 'thought.html'
  fields = ['text', 'created_at']
  

• Define _get_context helper:

   def _get_context(self, page=1, order_by='-created_at', **kwargs):
       context = {
           'fields': self.fields,
           'url_name': 'intray:thought',
           'form': ThoughtForm(),
       }
       queryset = Thought.objects.all().order_by(order_by or '-created_at')
       items, page_obj = get_paginated_queryset(queryset, page, paginate_by=8)
       context.update({
           'queryset': items,
           'page_obj': page_obj
       })
       return {**context, **kwargs}
  

  • methods: in beginning for every one:

    payload = extract_payload(request)
    match payload.pop('action', ''):
    

    • http get:

      def get(self, request, pk=None):
          payload = request.GET
      
          common_state = {
              'page': payload.get('page', 1),
              'order_by': payload.get('order_by', '-created_at')
          }
          match payload.pop('action'):
              case '':
                  context = self._get_context(**state)
                  return render(request, self.template_name, context)
      
              case 'normal-row':
                  piece = get_object_or_404(Thought, pk=pk)
                  context = self._get_context(
                      **state, piece=piece)
                  return render(request, f'{self.template_name}#table_row', context)
      
              case 'edit-row':
                  piece = get_object_or_404(Thought, pk=pk)
                  context = self._get_context(**state, piece=piece)
                  return render(request, f'{self.template_name}#edit_row', context)
      
              case 'project-picker':
                  piece = get_object_or_404(Thought, pk=pk)
                  form = ProjectPickerForm()
                  form.fields['parent_project'].queryset = form.fields['parent_project'].queryset.filter(
                      completed=False
                  )
                  context = self._get_context(
                      **state, piece=piece, form=form)
                  return render(request, f'{self.template_name}#project_picker', context)
      
              case _:
                  return HttpResponseBadRequest()
      

    • http put:

      • instance = get_object_or_404(Thought, pk=pk) in beginning of method, since pk is essential

      • Use extract_payload(request) to get the data, then update the instance

Workflow: Writing view action case

1. Define computation flow:

   piece = get_object_or_404(Thought, pk=pk)
   

2. Get context, pass needed computed values:

   local_state = {'piece': piece}
   context = self._get_context(**shared_state | local_state)
   

3. Return rendered Response:

   return render(request, f'{self.template_name}#table_row', context)
   

Workflow: Getting payload from request.

1. from apps.core.utils import extract_payload

2. Pass request into it.

3. Get extracted payload as dict.