when adding a new inline, it appears at first position after save about django-admin-sortable2 HOT 5 CLOSED

Maybe the bug sounds like #63 that happens to me.

Could you try to debug the adminsortable2/admin.py and see if the if getattr(obj, self.default_order_field, None) is None: (row 278) is True?
This statement, as you can see on code, evaluate max_order that is the value used to put the new inserted item on the last position.

I suspect that self.default_order_field is not None and his value is a number, 0 or maybe the default model value.

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I could not test yet, but I have already seen that it submits "0" for the added inline's order field...will check your suggestions soon.

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That is the issue. Just remove the default and use blank=True and null=True and it works by appending as expected. The docs are incorrect when they say default=0 is required.

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I update the description on PR #63 with a reference to this issue.
Thanks for contributing @therg

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after a quick check, I can confirm that blank=True and null=True work perfect. THX!

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