Hi all, I'm using the form's clean() method to do validation for models in admin. The validation we need to do is to make sure there are no more than a certain number of items totally submitted. So I calculate the total number of items in the clean() method and check whether it is in the given range. But the exact total number is difficult ot get because I don't know whether the newly submitted form'data is a modified item that is already submitted or it's a newly added item. So is there any way in the clean() method to know whether the form's data is a newly added item or a modified one? Thanks to all.--
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