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Added SequenceField.set_next_value(value) helper (#159)

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Ross Lawley
2013-04-23 14:44:17 +00:00
parent a692316293
commit 94d1e566c0
3 changed files with 41 additions and 19 deletions
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19
mongoengine/fields.py
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@@ -1408,13 +1408,13 @@ class SequenceField(BaseField):
COLLECTION_NAME = 'mongoengine.counters'
VALUE_DECORATOR = int
def __init__(self, collection_name=None, db_alias=None,
sequence_name=None, value_decorator=None, *args, **kwargs):
def __init__(self, collection_name=None, db_alias=None, sequence_name=None,
value_decorator=None, *args, **kwargs):
self.collection_name = collection_name or self.COLLECTION_NAME
self.db_alias = db_alias or DEFAULT_CONNECTION_NAME
self.sequence_name = sequence_name
self.value_decorator = (callable(value_decorator) and
value_decorator or self.VALUE_DECORATOR)
value_decorator or self.VALUE_DECORATOR)
return super(SequenceField, self).__init__(*args, **kwargs)
def generate(self):
@@ -1430,6 +1430,17 @@ class SequenceField(BaseField):
upsert=True)
return self.value_decorator(counter['next'])
def set_next_value(self, value):
"""Helper method to set the next sequence value"""
sequence_name = self.get_sequence_name()
sequence_id = "%s.%s" % (sequence_name, self.name)
collection = get_db(alias=self.db_alias)[self.collection_name]
counter = collection.find_and_modify(query={"_id": sequence_id},
update={"$set": {"next": value}},
new=True,
upsert=True)
return self.value_decorator(counter['next'])
def get_sequence_name(self):
if self.sequence_name:
return self.sequence_name
@@ -1438,7 +1449,7 @@ class SequenceField(BaseField):
return owner._get_collection_name()
else:
return ''.join('_%s' % c if c.isupper() else c
for c in owner._class_name).strip('_').lower()
for c in owner._class_name).strip('_').lower()
def __get__(self, instance, owner):
value = super(SequenceField, self).__get__(instance, owner)