def _save_create(self, doc, force_insert, write_concern):
"""Save a new document.
Helper method, should only be used inside save().
"""
doc_alias = None
if doc.get('properties', {}).get('db_alias', None):
doc_alias = doc['properties'].pop('db_alias')
if doc_alias:
alias_db = get_db(doc_alias)
collection = alias_db.get_collection(self._meta['collection'])
else:
collection = self._get_collection()
with set_write_concern(collection, write_concern) as wc_collection:
if force_insert:
return wc_collection.insert_one(doc).inserted_id
# insert_one will provoke UniqueError alongside save does not
# therefore, it need to catch and call replace_one.
if "_id" in doc:
raw_object = wc_collection.find_one_and_replace(
{"_id": doc["_id"]}, doc)
if raw_object:
return doc["_id"]
object_id = wc_collection.insert_one(doc).inserted_id
return object_id
def _save_create(self, doc, force_insert, write_concern):
"""Save a new document.
Helper method, should only be used inside save().
"""
collection = self._get_collection()
with set_write_concern(collection, write_concern) as wc_collection:
if force_insert:
return wc_collection.insert_one(doc).inserted_id
# insert_one will provoke UniqueError alongside save does not
# therefore, it need to catch and call replace_one.
if '_id' in doc:
raw_object = wc_collection.find_one_and_replace(
{'_id': doc['_id']}, doc)
if raw_object:
return doc['_id']
object_id = wc_collection.insert_one(doc).inserted_id
# In PyMongo 3.0, the save() call calls internally the _update() call
# but they forget to return the _id value passed back, therefore getting it back here
# Correct behaviour in 2.X and in 3.0.1+ versions
if not object_id and pymongo.version_tuple == (3, 0):
pk_as_mongo_obj = self._fields.get(
self._meta['id_field']).to_mongo(self.pk)
object_id = (self._qs.filter(pk=pk_as_mongo_obj).first()
and self._qs.filter(pk=pk_as_mongo_obj).first().pk
) # TODO doesn't this make 2 queries?
return object_id
def _save_update(self, doc, save_condition, write_concern):
"""Update an existing document.
Helper method, should only be used inside save().
"""
doc_alias = None
if doc.get('properties', {}).get('db_alias', None):
doc_alias = doc['properties'].pop('db_alias')
if doc.get('properties', {}).get('conn_settings', {}):
connection_properties = doc['properties'].pop('conn_settings')
self.verify_connection_setting(doc_alias,
connection_properties)
if doc_alias:
alias_db = get_db(doc_alias)
collection = alias_db.get_collection(self._meta['collection'])
else:
collection = self._get_collection()
object_id = doc["_id"]
created = False
select_dict = {}
if save_condition is not None:
select_dict = transform.query(self.__class__, **save_condition)
select_dict["_id"] = object_id
# Need to add shard key to query, or you get an error
shard_key = self._meta.get("shard_key", tuple())
for k in shard_key:
path = self._lookup_field(k.split("."))
actual_key = [p.db_field for p in path]
val = doc
for ak in actual_key:
val = val[ak]
select_dict[".".join(actual_key)] = val
update_doc = self._get_update_doc()
if update_doc:
upsert = save_condition is None
with set_write_concern(collection, write_concern) as wc_collection:
last_error = wc_collection.update_one(select_dict,
update_doc,
upsert=upsert).raw_result
if not upsert and last_error["n"] == 0:
raise SaveConditionError(
"Race condition preventing document update detected")
if last_error is not None:
updated_existing = last_error.get("updatedExisting")
if updated_existing is False:
created = True
# !!! This is bad, means we accidentally created a new,
# potentially corrupted document. See
# https://github.com/MongoEngine/mongoengine/issues/564
return object_id, created
def _save_update(self, doc, save_condition, write_concern):
"""Update an existing document.
Helper method, should only be used inside save().
"""
collection = self._get_collection()
object_id = doc['_id']
created = False
select_dict = {}
if save_condition is not None:
select_dict = transform.query(self.__class__, **save_condition)
select_dict['_id'] = object_id
# Need to add shard key to query, or you get an error
shard_key = self._meta.get('shard_key', tuple())
for k in shard_key:
path = self._lookup_field(k.split('.'))
actual_key = [p.db_field for p in path]
val = doc
for ak in actual_key:
val = val[ak]
select_dict['.'.join(actual_key)] = val
update_doc = self._get_update_doc()
if update_doc:
upsert = save_condition is None
with set_write_concern(collection, write_concern) as wc_collection:
last_error = wc_collection.update_one(
select_dict,
update_doc,
upsert=upsert
).raw_result
if not upsert and last_error['n'] == 0:
raise SaveConditionError('Race condition preventing'
' document update detected')
if last_error is not None:
updated_existing = last_error.get('updatedExisting')
if updated_existing is False:
created = True
# !!! This is bad, means we accidentally created a new,
# potentially corrupted document. See
# https://github.com/MongoEngine/mongoengine/issues/564
return object_id, created
def test_set_write_concern(self):
connect("mongoenginetest")
class User(Document):
name = StringField()
collection = User._get_collection()
original_write_concern = collection.write_concern
with set_write_concern(
collection, {"w": "majority", "j": True, "wtimeout": 1234}
) as updated_collection:
assert updated_collection.write_concern.document == {
"w": "majority",
"j": True,
"wtimeout": 1234,
}
assert original_write_concern.document == collection.write_concern.document
def _save_create(self, doc, force_insert, write_concern):
"""Save a new document.
Helper method, should only be used inside save().
"""
collection = self._get_collection()
with set_write_concern(collection, write_concern) as wc_collection:
if force_insert:
return wc_collection.insert_one(doc).inserted_id
# insert_one will provoke UniqueError alongside save does not
# therefore, it need to catch and call replace_one.
if '_id' in doc:
raw_object = wc_collection.find_one_and_replace(
{'_id': doc['_id']}, doc)
if raw_object:
return doc['_id']
object_id = wc_collection.insert_one(doc).inserted_id
return object_id
def _save_create(self, doc, force_insert, write_concern):
"""Save a new document.
Helper method, should only be used inside save().
"""
collection = self._get_collection()
with set_write_concern(collection, write_concern) as wc_collection:
if force_insert:
return wc_collection.insert_one(doc).inserted_id
# insert_one will provoke UniqueError alongside save does not
# therefore, it need to catch and call replace_one.
if '_id' in doc:
raw_object = wc_collection.find_one_and_replace(
{'_id': doc['_id']}, doc)
if raw_object:
return doc['_id']
object_id = wc_collection.insert_one(doc).inserted_id
return object_id
def _save_update(self, doc, save_condition, write_concern):
"""Update an existing document.
Helper method, should only be used inside save().
"""
collection = self._get_collection()
object_id = doc["_id"]
created = False
select_dict = {}
if save_condition is not None:
select_dict = transform.query(self.__class__, **save_condition)
select_dict["_id"] = object_id
select_dict = self._integrate_shard_key(doc, select_dict)
update_doc = self._get_update_doc()
if update_doc:
upsert = save_condition is None
with set_write_concern(collection, write_concern) as wc_collection:
last_error = wc_collection.update_one(
select_dict,
update_doc,
upsert=upsert,
session=self._get_local_session(),
).raw_result
if not upsert and last_error["n"] == 0:
raise SaveConditionError(
"Race condition preventing document update detected")
if last_error is not None:
updated_existing = last_error.get("updatedExisting")
if updated_existing is False:
created = True
# !!! This is bad, means we accidentally created a new,
# potentially corrupted document. See
# https://github.com/MongoEngine/mongoengine/issues/564
return object_id, created
def _save_create(self, doc, force_insert, write_concern):
"""Save a new document.
Helper method, should only be used inside save().
"""
collection = self._get_collection()
with set_write_concern(collection, write_concern) as wc_collection:
if force_insert:
return wc_collection.insert_one(
doc, session=self._get_local_session()).inserted_id
# insert_one will provoke UniqueError alongside save does not
# therefore, it need to catch and call replace_one.
if "_id" in doc:
select_dict = {"_id": doc["_id"]}
select_dict = self._integrate_shard_key(doc, select_dict)
raw_object = wc_collection.find_one_and_replace(
select_dict, doc, session=self._get_local_session())
if raw_object:
return doc["_id"]
object_id = wc_collection.insert_one(
doc, session=self._get_local_session()).inserted_id
return object_id
