CODEWITHSUNDEEP
pythondjangodjango-views
MutMutrina
MutMutrina

Reputation: 57

Get deleted object in Django DeleteView

I want to show an info message after deleting an object from a database. I decided to use SuccessMessageMixin for that purpose. How I can add object attributes to the success_message?

class PostDeleteView(SuccessMessageMixin, DeleteView):
   model = Post
   success_url = reverse_lazy('post_list')

   def get_success_message(self, cleaned_data):
       return 'The ' + str(self.object) + ' post was deleted'

I thought I can do it that way. But there is no message after the deletion.

Upvotes: 1

Views: 885

Answers (1)

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 477685

The SuccessMessageMixin [Django-doc] only runs when a form is valid, so when the view inherits from a FormView [Django-doc], or as specified in the documentation:

Adds a success message attribute to FormView based classes.

You can not use this with a DeleteView, since a DeleteView does not use a FormView (or uses a FormMixin).

You can however make your own mixin, and use this for all DeleteViews based on the implementation of the SuccessMessageMixin [GitHub]:

from django.contrib import messages

class SuccessDeleteMessageMixin:
    success_message = ''

    def delete(self, *args, **kwargs):
        response = super().delete(*args, **kwargs)
        success_message = self.get_success_message()
        if success_message:
            messages.success(self.request, success_message)
        return response

    def get_success_message(self):
        return self.success_message

and then use this mixin with:

class PostDeleteView(SuccessDeleteMessageMixin, DeleteView):
   model = Post
   success_url = reverse_lazy('post_list')

   def get_success_message(self, cleaned_data):
       return f'The post {self.object} was deleted'

Upvotes: 3

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