Personalizar formulário do admin do Django com base no usuário - Dois exemplos diferentes

admin.py

class MyModelAdmin(admin.ModelAdmin):
    def get_fieldsets(self, request, obj=None):
        if obj:
            return [(None, {'fields': ('field_c', 'field_b')})]
        return [(None, {'fields': ('field_a', 'field_b', 'field_c')})]

    def get_form(self, request, obj=None, **kwargs):
        if obj:
            defaults = {'exclude': ('field_a',)}
        else:
            defaults = {}
        defaults.update(kwargs)
        return super(MyModelAdmin, self).get_form(request, obj, **defaults)
        
        
# https://code.djangoproject.com/ticket/8387

forms.py

class EventForm(forms.ModelForm):
    class Meta:
        model = models.Event
        exclude = ['description',]

class EventAdminForm(forms.ModelForm):
    class Meta:
        model = models.Event

class EventAdmin(admin.ModelAdmin):

    def get_form(self, request, obj=None, **kwargs):
        if request.user.is_superuser:
            return EventAdminForm
        else:
            return EventForm 

admin.site.register(models.Event, EventAdmin)

# http://stackoverflow.com/questions/687829/django-overriding-get-form-to-customize-admin-forms-based-on-request