def ok(doc):
if doc is None:
raise NoFile(
"TxMongo: no file in gridfs with filename {0}".format(
repr(filename)))
return GridOut(self.__collection, doc)
def get_last_version(self, filename):
"""Get a file from GridFS by ``"filename"``.
Returns the most recently uploaded file in GridFS with the
name `filename` as an instance of
:class:`~gridfs.grid_file.GridOut`. Raises
:class:`~gridfs.errors.NoFile` if no such file exists.
An index on ``{filename: 1, uploadDate: -1}`` will
automatically be created when this method is called the first
time.
:Parameters:
- `filename`: ``"filename"`` of the file to get
.. versionadded:: 1.6
"""
self.__files.ensure_index(
filter.sort(ASCENDING("filename") + DESCENDING("uploadDate")))
doc = yield self.__files.find_one({"filename": filename},
filter=filter.sort(
DESCENDING("uploadDate")))
if doc is None:
raise NoFile("TxMongo: no file in gridfs with filename {0}".format(
repr(filename)))
defer.returnValue(GridOut(self.__collection, doc))
def get(self, file_id):
"""Get a file from GridFS by ``"_id"``.
Returns an instance of :class:`~gridfs.grid_file.GridOut`,
which provides a file-like interface for reading.
:Parameters:
- `file_id`: ``"_id"`` of the file to get
.. versionadded:: 1.6
"""
doc = yield self.__files.find_one({'_id': file_id})
defer.returnValue(GridOut(self.__collection, doc))
def get(self, file_id):
"""Get a file from GridFS by ``"_id"``.
Returns an instance of :class:`~gridfs.grid_file.GridOut`,
which provides a file-like interface for reading.
:Parameters:
- `file_id`: ``"_id"`` of the file to get
.. versionadded:: 1.6
"""
doc = yield self.__collection.files.find_one({"_id": file_id})
if doc is None:
raise NoFile("TxMongo: no file in gridfs with _id {0}".format(
repr(file_id)))
defer.returnValue(GridOut(self.__collection, doc))
def _cb_get_last_version(self, docs, filename):
try:
grid_file = docs[0]
return GridOut(self.__collection, grid_file)
except IndexError:
raise NoFile("no file in gridfs with filename %r" % filename)
def ok(cursor):
if cursor:
return GridOut(self.__collection, cursor[0])
raise NoFile("no version %d for filename %r" % (version, filename))