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