Allow only one instance of a model in Django

Question

I would like to control some configuration settings for my project using a database model. For example:

class JuicerBaseSettings(models.Model):
    max_rpm =         


        

Answer 1

I'm a bit late to the party but if you want to ensure that only one instance of an object is created, an alternative solution to modifying a models save() function would be to always specify an ID of 1 when creating an instance - that way, if an instance already exists, an integrity error will be raised. e.g.

JuicerBaseSettings.objects.create(id=1)

instead of:

JuicerBaseSettings.objects.create()

It's not as clean of a solution as modifying the save function but it still does the trick.