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Documented how to copy a OneToOneField.
Thanks Anton Gilgur for the report and review.
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@ -985,6 +985,15 @@ entry::
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entry.save()
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entry.authors.set(old_authors)
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For a ``OneToOneField``, you must duplicate the related object and assign it
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to the new object's field to avoid violating the one-to-one unique constraint.
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For example, assuming ``entry`` is already duplicated as above::
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detail = EntryDetail.objects.all()[0]
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detail.pk = None
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detail.entry = entry
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detail.save()
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.. _topics-db-queries-update:
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Updating multiple objects at once
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