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Code Issues 32 Releases Wiki Activity

Fixed #28332 -- Fixed diamond inheritence example in docs.

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This commit is contained in:
Jeremy Satterfield
2017-08-17 13:06:29 -05:00
committed by Tim Graham
parent 60443e84b3
commit 473ab4610e
1 changed files with 6 additions and 1 deletions
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7
docs/topics/db/models.txt
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@@ -1346,15 +1346,20 @@ use an explicit :class:`~django.db.models.AutoField` in the base models::
class BookReview(Book, Article):
pass
Or use a common ancestor to hold the :class:`~django.db.models.AutoField`::
Or use a common ancestor to hold the :class:`~django.db.models.AutoField`. This
requires using an explicit :class:`~django.db.models.OneToOneField` from each
parent model to the common ancestor to avoid a clash between the fields that
are automatically generated and inherited by the child::
class Piece(models.Model):
pass
class Article(Piece):
article_piece = models.OneToOneField(Piece, on_delete=models.CASCADE, parent_link=True)
...
class Book(Piece):
book_piece = models.OneToOneField(Piece, on_delete=models.CASCADE, parent_link=True)
...
class BookReview(Book, Article):