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Support None if initial part of dotted lookup returns None. Closes #1223.

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This commit is contained in:
Tom Christie 2014-11-05 10:28:34 +00:00
parent c70242c35b
commit 26b6180f50
1 changed files with 3 additions and 0 deletions
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3
rest_framework/fields.py
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@ -57,6 +57,9 @@ def get_attribute(instance, attrs):
Also accepts either attribute lookup on objects or dictionary lookups. Also accepts either attribute lookup on objects or dictionary lookups.
""" """
for attr in attrs: for attr in attrs:
if instance is None:
# Break out early if we get `None` at any point in a nested lookup.
return None
try: try:
instance = getattr(instance, attr) instance = getattr(instance, attr)
except ObjectDoesNotExist: except ObjectDoesNotExist: