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# Copyright (C) 2014-2017 MongoDB, 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.
require 'mongo/operation/write/delete/result'
module Mongo
module Operation
module Write
# A MongoDB delete operation.
#
# @note If a server with version >= 2.5.5 is selected, a write command
# operation will be created and sent instead.
#
# @example Create the delete operation.
# Write::Delete.new({
# :delete => { :q => { :foo => 1 }, :limit => 1 },
# :db_name => 'test',
# :coll_name => 'test_coll',
# :write_concern => write_concern
# })
#
# Initialization:
# param [ Hash ] spec The specifications for the delete.
#
# option spec :delete [ Hash ] The delete document.
# option spec :db_name [ String ] The name of the database on which
# the delete should be executed.
# option spec :coll_name [ String ] The name of the collection on which
# the delete should be executed.
# option spec :write_concern [ Mongo::WriteConcern ] The write concern
# for this operation.
# option spec :ordered [ true, false ] Whether the operations should be
# executed in order.
# option spec :options [Hash] Options for the command, if it ends up being a
# write command.
#
# @since 2.0.0
class Delete
include GLE
include WriteCommandEnabled
include Specifiable
private
def write_command_op
s = spec.merge(:deletes => [ delete ])
s.delete(:delete)
Command::Delete.new(s)
end
def has_collation?
delete[:collation] || delete[Operation::COLLATION]
end
def message(server)
selector = delete[Operation::Q]
opts = (delete[Operation::LIMIT] || 0) <= 0 ? {} : { :flags => [ :single_remove ] }
Protocol::Delete.new(db_name, coll_name, selector, opts)
end
end
end
end
end
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