How to display subcategory depending on category in Django admin?

Question

Django

Hello, tell me what is the best way to make subcategories in the admin panel, all in separate selects using ajax (example in GIF). I decided to use django-smart-selects, but it doesn't work, the problem is that it doesn't return any values.

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More details about the
task

• Russia
  
• USA
  

When choosing the category Russia, in the model select, the subcategory Cities appeared

• Moscow
  
• Peter
  
• Eagle
  
• .......
  

When choosing the category USA, in the select subcategory Cities appeared

• New York
  
• Los Angeles
  
• Chicago
  
• .......