singleton-admin

Using singleton-admin will allow users to only add one instance of a model via the django admin site. Once created, the instance can be updated and deleted, but additional instances cannot be created.

This is useful if you'd like to store a page content in the database for example.

I found myself using this package (https://github.com/tttallis/django-singletons) a lot, but some of the code has now been depreciated through newer releases of Django.

I originally had the intention of forking the package and making the fixes, but in the end I ended up re-writing from scratch. The end goal is the same, but with a different approach.

I appreciate that there are probably plenty of packages out there that offer similar functionality, but as I've put this together and have used in my own projects, I thought I'd get it out there.

Quick start

1. Install singleton-admin:

   pip install singleton-admin

2. Add "singleton_admin" to your INSTALLED_APPS:

   INSTALLED_APPS = [
       ...
       'singleton_admin',
   ]

3. In your apps admin.py file to make your model a singleton-admin you can either do:

   from singleton_admin.admin import SingletonAdmin
   
   admin.site.register(your_model, SingletonAdmin)

Or if you'd like to add your own admin class:

from singleton_admin.admin import SingletonAdmin

class your_model_admin(SingletonAdmin):
    ...

admin.site.register(your_model, your_model_admin)