OpenProject is the leading open source project management software.
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openproject/lib/api/v3/work_packages/eager_loading/checksum.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2018 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See docs/COPYRIGHT.rdoc for more details.
#++
module API
module V3
module WorkPackages
module EagerLoading
class Checksum < Base
def apply(work_package)
work_package.cache_checksum = cache_checksum_of(work_package)
end
def self.module
CacheChecksumAccessor
end
class << self
def for(work_package)
fetch_checksums_for(Array(work_package))[work_package.id]
end
def fetch_checksums_for(work_packages)
WorkPackage
.where(id: work_packages.map(&:id).uniq)
.left_joins(:status, :author, :responsible, :assigned_to, :fixed_version, :priority, :category, :type)
.pluck('work_packages.id', Arel.sql(md5_concat.squish))
.to_h
end
protected
def md5_concat
<<-SQL
MD5(CONCAT(statuses.id,
statuses.updated_at,
users.id,
users.updated_on,
responsibles_work_packages.id,
responsibles_work_packages.updated_on,
assigned_tos_work_packages.id,
assigned_tos_work_packages.updated_on,
versions.id,
versions.updated_on,
types.id,
types.updated_at,
enumerations.id,
enumerations.updated_at,
categories.id,
categories.updated_at))
SQL
end
end
private
def cache_checksum_of(work_package)
cache_checksums[work_package.id]
end
def cache_checksums
@cache_checksums ||= self.class.fetch_checksums_for(work_packages)
end
end
module CacheChecksumAccessor
extend ActiveSupport::Concern
included do
attr_accessor :cache_checksum
end
end
end
end
end
end