code: def post(self, request, *args, **kwargs):
          
          self.init_attachment_cache()
  
          # Stores a boolean indicating if we are considering a preview
          self.preview = 'preview' in self.request.POST
  
          # Initializes the forms
          post_form_class = self.get_post_form_class()
          post_form = self.get_post_form(post_form_class)
          attachment_formset_class = self.get_attachment_formset_class()
          attachment_formset = self.get_attachment_formset(attachment_formset_class)
  
          self.attachment_preview = (
              self.preview if attachment_formset and attachment_formset.is_valid() else None
          )
  
          post_form_valid = post_form.is_valid()
          if (
              (post_form_valid and attachment_formset is None) or
              (post_form_valid and attachment_formset.is_valid())
          ):
              return self.form_valid(post_form, attachment_formset)
          else:
              return self.form_invalid(post_form, attachment_formset)
docs: Handles POST requests.