Custom unicode on already created object

I'm using permissions in my application. And in some case I need to create form only with permission field. I'm using ModelChoiceField and queryset with permission objects.

permission = forms.ModelChoiceField开发者_开发技巧(queryset = Permission.objects.all())

But permissions unicode is taking too much place in choice field. And it looks not so good. I want to use in my choice field only permission's name. Is it possible?

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You can create a proxy model, and override the __unicode__() method on that.