:date: 2017-04-28

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Friday, April 28, 2017
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Yes, on_duplicate is called on the new instance (the copy) before it
is being saved. That's important, and there is application code based
on it.  But note that related objects (the the wishes of the meeting)
are being automatically copied when they have `allow_cascaded_copy`
set to True. That's probably what you want.  Look at the run_from_code
method of the [py lino.mixins.duplicable.Duplicate] action.