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Add SaveConditionError exception

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This commit is contained in:
Emmanuel Leblond 2015-07-15 11:15:40 +02:00
parent 9c8ceb6b4e
commit a3e0fbd606
2 changed files with 8 additions and 3 deletions
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7
mongoengine/document.py
View File

@ -16,7 +16,8 @@ from mongoengine.base import (
ALLOW_INHERITANCE,
get_document
)
from mongoengine.errors import InvalidQueryError, InvalidDocumentError
from mongoengine.errors import (InvalidQueryError, InvalidDocumentError,
SaveConditionError)
from mongoengine.python_support import IS_PYMONGO_3
from mongoengine.queryset import (OperationError, NotUniqueError,
QuerySet, transform)
@ -359,8 +360,8 @@ class Document(BaseDocument):
last_error = collection.update(select_dict, update_query,
upsert=upsert, **write_concern)
if not upsert and last_error['nModified'] == 0:
raise OperationError('Race condition preventing'
' document update detected')
raise SaveConditionError('Race condition preventing'
' document update detected')
created = is_new_object(last_error)
if cascade is None:

4
mongoengine/errors.py
View File

@ -41,6 +41,10 @@ class NotUniqueError(OperationError):
pass
class SaveConditionError(OperationError):
pass
class FieldDoesNotExist(Exception):
"""Raised when trying to set a field
not declared in a :class:`~mongoengine.Document`