mongo-ruby-driver/lib/mongo/gridfs/grid_file_system.rb

63 lines
1.9 KiB
Ruby
Raw Normal View History

2010-02-18 21:31:25 +00:00
# --
2010-02-19 22:41:36 +00:00
# Copyright (C) 2008-2010 10gen Inc.
2010-02-18 21:31:25 +00:00
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ++
module Mongo
# WARNING: This class is part of a new, experimental GridFS API. Subject to change.
class GridFileSystem < Grid
2010-02-22 23:06:59 +00:00
def initialize(db, fs_name=Grid::DEFAULT_FS_NAME)
raise MongoArgumentError, "db must be a Mongo::DB." unless db.is_a?(Mongo::DB)
@db = db
@files = @db["#{fs_name}.files"]
@chunks = @db["#{fs_name}.chunks"]
@fs_name = fs_name
2010-02-18 21:31:25 +00:00
@files.create_index([['filename', 1], ['uploadDate', -1]])
2010-02-22 20:49:04 +00:00
@default_query_opts = {:sort => [['filename', 1], ['uploadDate', -1]], :limit => 1}
2010-02-18 21:31:25 +00:00
end
def open(filename, mode, opts={})
2010-02-22 20:49:04 +00:00
opts.merge!(default_grid_io_opts(filename))
file = GridIO.new(@files, @chunks, filename, mode, opts)
2010-02-18 21:31:25 +00:00
return file unless block_given?
result = nil
begin
result = yield file
ensure
file.close
end
result
end
2010-02-22 23:06:59 +00:00
def delete(filename)
files = @files.find({'filename' => filename}, :fields => ['_id'])
files.each do |file|
@files.remove({'_id' => file['_id']})
@chunks.remove({'files_id' => file['_id']})
end
2010-02-18 21:31:25 +00:00
end
2010-02-22 23:06:59 +00:00
alias_method :unlink, :delete
2010-02-18 21:31:25 +00:00
2010-02-22 20:49:04 +00:00
private
def default_grid_io_opts(filename=nil)
{:fs_name => @fs_name, :query => {'filename' => filename}, :query_opts => @default_query_opts}
end
2010-02-18 21:31:25 +00:00
end
end