How to implement multistep form in Django admin

My task is to provide an opportunity to fill out the form in several stages, processing the result of each step.

I found an example of what I need, but this example 2009

I know about the form, but I don't understand how to implement it in Dango admin.

I tried to do this:

def get_urls(self):
    urls = super(MyCustomAdmin, self).get_urls()
    my_urls = [
        url(r'^my_view/$', Wizard.as_view([Form1, Form2]))        
    ]
    return my_urls + urls

      

        
        
        
      

    

But I got an error:

AttributeError at / admin / custom / custommodel / my_view /

NoneType object has no 'rsplit' attribute

Perhaps Wizard form

not the best option. But I don't know how to implement the job otherwise