Django comparing model instances for equality

Question

I understand that, with a singleton situation, you can perform such an operation as:

spam == eggs

and if spam and eggs

Answer 1

Just for the record, comparing:

    spam == eggs

is dangerous if there is any chance that either of them could be a deferred model instance created by Model.objects.raw() query or by .defer() applied to a 'normal' QuerySet.

I put more details here: Django QuerySet .defer() problem - bug or feature?