text: """Django edit view things for sqlalchemy."""
  
  from django.core.exceptions import ImproperlyConfigured
  from django.http import HttpResponseRedirect
  from django.views.generic.base import TemplateResponseMixin, View
  from django.views.generic.edit import FormMixin
  
  from .. import forms
  from .detail import (
      BaseDetailView,
      SingleObjectMixin,
      SingleObjectTemplateResponseMixin,
  )
  
  
  class ModelFormMixin(FormMixin, SingleObjectMixin):
      """Provide a way to show and handle a ModelForm in a request."""
  
      fields = None
  
      def get_form_class(self):
          if self.fields is not None and self.form_class:
              raise ImproperlyConfigured("Specifying both 'fields' and 'form_class' is not permitted.")
  
          if self.form_class:
              return self.form_class
  
          model = self.get_model()
          return forms.modelform_factory(model, fields=self.fields, session=self.session)
  
      def get_form_kwargs(self):
          """Return the keyword arguments for instantiating the form."""
          kwargs = super().get_form_kwargs()
          if hasattr(self, "object"):
              kwargs.update({"instance": self.object})
  
          kwargs["session"] = self.session
          return kwargs
  
      def get_success_url(self):
          """Return the URL to redirect to after processing a valid form."""
          if self.success_url:
              return self.success_url.format(**vars(self.object))
  
          raise ImproperlyConfigured(
              "No URL to redirect to. Either provide a url or override this function to return a url"
          )
  
      def form_valid(self, form):
          self.object = form.save()
          return super().form_valid(form)
  
  
  class ProcessFormView(View):
      """Render a form on GET and processes it on POST."""
  
      def get(self, request, *args, **kwargs):
          """Handle GET requests: instantiate a blank version of the form."""
          return self.render_to_response(self.get_context_data())
  
      def post(self, request, *args, **kwargs):
          """Handle POST requests: instantiate a form instance with the passed
          POST variables and then check if it's valid."""
          form = self.get_form()
          if form.is_valid():
              return self.form_valid(form)
  
          return self.form_invalid(form)
  
      put = post
  
  
  class BaseFormView(FormMixin, ProcessFormView):
      """A base view for displaying a form."""
  
  
  class FormView(TemplateResponseMixin, BaseFormView):
      """A view for displaying a form and rendering a template response."""
  
  
  class BaseCreateView(ModelFormMixin, ProcessFormView):
      """Base view for creating a new object instance.
  
      Using this base class requires subclassing to provide a response
      mixin.
      """
  
      def get(self, request, *args, **kwargs):
          self.object = None
          return super().get(request, *args, **kwargs)
  
      def post(self, request, *args, **kwargs):
          self.object = None
          return super().post(request, *args, **kwargs)
  
  
  class CreateView(SingleObjectTemplateResponseMixin, BaseCreateView):
      """View for creating a new object, with a response rendered by a
      template."""
  
      template_name_suffix = "_form"
  
  
  class BaseUpdateView(ModelFormMixin, ProcessFormView):
      """Base view for updating an existing object.
  
      Using this base class requires subclassing to provide a response
      mixin.
      """
  
      def get(self, request, *args, **kwargs):
          self.object = self.get_object()
          return super().get(request, *args, **kwargs)
  
      def post(self, request, *args, **kwargs):
          self.object = self.get_object()
          return super().post(request, *args, **kwargs)
  
  
  class UpdateView(SingleObjectTemplateResponseMixin, BaseUpdateView):
      """View for updating an object, with a response rendered by a template."""
  
      template_name_suffix = "_form"
  
  
  class DeletionMixin:
      """Provide the ability to delete objects."""
  
      success_url = None
  
      def delete(self, request, *args, **kwargs):
          """Call the delete() method on the fetched object and then redirect to
          the success URL."""
          self.object = self.get_object()
          success_url = self.get_success_url()
          self.session.delete(self.object)
          self.session.flush()
          return HttpResponseRedirect(success_url)
  
      # Add support for browsers which only accept GET and POST for now.
  
      def post(self, request, *args, **kwargs):
          """Handle POST request on deleve view."""
          return self.delete(request, *args, **kwargs)
  
      def get_success_url(self):
          """Returns the URL to redirect to after processing deletion."""
          if self.success_url:
              return self.success_url.format(**self.object.__dict__)
  
          else:
              raise ImproperlyConfigured("No URL to redirect to. Provide a success_url.")
  
  
  class BaseDeleteView(DeletionMixin, BaseDetailView):
      """Base view for deleting an object.
  
      Using this base class requires subclassing to provide a response
      mixin.
      """
  
  
  class DeleteView(SingleObjectTemplateResponseMixin, BaseDeleteView):
      """View for deleting an object retrieved with self.get_object(), with a
      response rendered by a template."""
  
      template_name_suffix = "_confirm_delete"
  