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

64 lines
1.7 KiB
Ruby

# --
# Copyright (C) 2008-2010 10gen Inc.
#
# 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 Grid
DEFAULT_FS_NAME = 'fs'
def initialize(db, fs_name=DEFAULT_FS_NAME)
check_params(db)
@db = db
@files = @db["#{fs_name}.files"]
@chunks = @db["#{fs_name}.chunks"]
@fs_name = fs_name
@chunks.create_index([['files_id', Mongo::ASCENDING], ['n', Mongo::ASCENDING]])
end
def put(data, filename, opts={})
opts.merge!(default_grid_io_opts)
file = GridIO.new(@files, @chunks, filename, 'w', opts=opts)
file.write(data)
file.close
file.files_id
end
def get(id)
opts = {:query => {'_id' => id}}.merge!(default_grid_io_opts)
GridIO.new(@files, @chunks, nil, 'r', opts)
end
def delete(id)
@files.remove({"_id" => id})
@chunks.remove({"_id" => id})
end
private
def default_grid_io_opts
{:fs_name => @fs_name}
end
def check_params(db)
if !db.is_a?(Mongo::DB)
raise MongoArgumentError, "db must be an instance of Mongo::DB."
end
end
end
end