list_display - boolean icons for methods
This is documented, although it's a bit hard to find - go a couple of screens down from here, and you'll find this:
If the string given is a method of the model, ModelAdmin or a callable that returns True or False Django will display a pretty "on" or "off" icon if you give the method a
booleanattribute whose value isTrue.
and the example given is:
def born_in_fifties(self): return self.birthday.strftime('%Y')[:3] == '195'born_in_fifties.boolean = True
Thanks to @daniel-roseman (rtfm)
Since Django 3.2 there is a decorator @admin.display(boolean=True):
If the string (in
list_display) given is a method of the model,ModelAdminor a callable that returnsTrue,False, orNone, Djangowill display a pretty “yes”, “no”, or “unknown” icon if you wrap themethod with thedisplay()decorator passing thebooleanargument withthe value set toTrue:
class Person(models.Model): birthday = models.DateField() @admin.display(boolean=True) def born_in_fifties(self): return 1950 <= self.birthday.year < 1960