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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.
module Mongo
module Operation
module Write
class Update
# Defines custom behaviour of results for an update.
#
# @since 2.0.0
class Result < Operation::Result
# The number of modified docs field in the result.
#
# @since 2.0.0
MODIFIED = 'nModified'.freeze
# The upserted docs field in the result.
#
# @since 2.0.0
UPSERTED = 'upserted'.freeze
# Get the number of documents matched.
#
# @example Get the matched count.
# result.matched_count
#
# @return [ Integer ] The matched count.
#
# @since 2.0.0
def matched_count
return 0 unless acknowledged?
if upsert?
0
else
n
end
end
# Get the number of documents modified.
#
# @example Get the modified count.
# result.modified_count
#
# @return [ Integer ] The modified count.
#
# @since 2.0.0
def modified_count
return 0 unless acknowledged?
first[MODIFIED]
end
# The identifier of the inserted document if an upsert
# took place.
#
# @example Get the upserted document's identifier.
# result.upserted_id
#
# @return [ Object ] The upserted id.
#
# @since 2.0.0
def upserted_id
return nil unless upsert?
upsert?.first['_id']
end
# Returns the number of documents upserted.
#
# @example Get the number of upserted documents.
# result.upserted_count
#
# @return [ Integer ] The number upserted.
#
# @since 2.4.2
def upserted_count
upsert? ? n : 0
end
private
def upsert?
first[UPSERTED]
end
end
# Defines custom behaviour of results for an update on server
# version <= 2.4.
#
# @since 2.0.0
class LegacyResult < Operation::Result
# Whether an existing document was updated.
#
# @since 2.0.0
UPDATED_EXISTING = 'updatedExisting'.freeze
# The upserted docs field in the result.
#
# @since 2.0.0
UPSERTED = 'upserted'.freeze
# Get the number of documents matched.
#
# @example Get the matched count.
# result.matched_count
#
# @return [ Integer ] The matched count.
#
# @since 2.0.0
def matched_count
return 0 unless acknowledged?
if upsert?
0
else
n
end
end
# Get the number of documents modified.
#
# @example Get the modified count.
# result.modified_count
#
# @return [ nil ] Always omitted for legacy versions.
#
# @since 2.0.0
def modified_count; end
# The identifier of the inserted document if an upsert
# took place.
#
# @example Get the upserted document's identifier.
# result.upserted_id
#
# @return [ Object ] The upserted id.
#
# @since 2.0.0
def upserted_id
first[UPSERTED] if upsert?
end
# Returns the number of documents upserted.
#
# @example Get the number of upserted documents.
# result.upserted_count
#
# @return [ Integer ] The number upserted.
#
# @since 2.4.2
def upserted_count
upsert? ? n : 0
end
private
def upsert?
!updated_existing? && n == 1
end
def updated_existing?
first[UPDATED_EXISTING]
end
end
end
end
end
end
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