Question

I want to display a field as read only in a ModelAdmin form, so I added it to the readonly_fields attribute.

However, since the field contains a currency, stored as an integer, I want to apply some nice formatting it. I’ve created a custom ModelForm for my ModelAdmin, trying to apply the formatting in the overridden __init__ method.

The problem is, I cannot find the value. The field is not present in the self.fields attribute.

Does anyone know where the values for the readonly_fields are kept, or is there a better/different approach?

Answer 1

Just do something like:

class MyAdmin(admin.ModelAdmin):
    readonly_fields = ('foo',)

    def foo(self, obj):
        return '${0}'.format(obj.amount)