[FIXED] Handle PROTECT ERROR in Django DeleteView

Issue

I am using Django DeleteView to delete items in my database. I have use separate template to show the delete confirmation message, but when I press the yes button I get ProtectedError since customer table is linked with Accounts table. Hence I want to handle the ProtectedError and give user another message in the same template.

Here is the code I have used to perform the delete:

class Customer(DeleteView):
    #Delete Customers
    model = Customer
    template_name = 'project_templates/delete_customer.html'

    def get_success_url(self):
        return reverse('inactive_customers')

It would be really great if someone can suggest me a method to handle this situation.

Solution

You should be able to catch the exception. When you look at the DeletionMixin:

https://github.com/django/django/blob/master/django/views/generic/edit.py#L256

You can override the post method and achieve something like:

def post(self, request, *args, **kwargs):
    try:
        return self.delete(request, *args, **kwargs)
    except ProtectedError:
        # render the template with your message in the context
        # or you can use the messages framework to send the message

Hope this helps.

Answered By - jbub