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Fixed #22048 - Enhanced docs to cover nonexistent one-to-one relationships.

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Thanks EvilDMP for the suggestion.
This commit is contained in:
Adam Kaliński 2014-02-22 20:29:55 +01:00 • committed by Tim Graham
parent 60d2dde286
commit ec08d62a20
2 changed files with 20 additions and 4 deletions
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15
docs/topics/db/examples/one_to_one.txt
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@ -61,10 +61,17 @@ A Place can access its restaurant, if available::
p2 doesn't have an associated restaurant::
>>> p2.restaurant
Traceback (most recent call last):
...
DoesNotExist: Restaurant matching query does not exist.
>>> from django.core.exceptions import ObjectDoesNotExist
>>> try:
>>> p2.restaurant
>>> except ObjectDoesNotExist:
>>> print("There is no restaurant here.")
There is no restaurant here.
You can also use ``hasattr`` to avoid the need for exception catching::
>>> hasattr(p2, 'restaurant')
False
Set the place using assignment notation. Because place is the primary key on
Restaurant, the save will create a new restaurant::