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

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improve wp#index performance by eager loading custom actions
7 years ago
#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
introduce custom eager loading for work package list Reduces the amount of AR models instantiated when handing wp#index requests by: * Calculating part of the checksum for caching in the db. This is done by using the id and the updated_at/on field of associated models whose representation is cached in the wp representer. * Reusing instantiated models for multiple associations. e.g instances of Project are used in various places (the work package itself, it's ancestors and children). Instead of using Rails' eager loading which would instantiate a project potentially once for every association path, the code now assigns the same instance to all those associations. Additionally, the commit streamlines the creation of custom field injected representers. Now only one class is created for all work packages when before it would be one class for every uniq set of custom fields. On top of that, the class can be reused if the set of custom fields does not change.
7 years ago
# Copyright (C) 2012-2018 the OpenProject Foundation (OPF)
improve wp#index performance by eager loading custom actions
7 years ago
#
# 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.
#
introduce custom eager loading for work package list Reduces the amount of AR models instantiated when handing wp#index requests by: * Calculating part of the checksum for caching in the db. This is done by using the id and the updated_at/on field of associated models whose representation is cached in the wp representer. * Reusing instantiated models for multiple associations. e.g instances of Project are used in various places (the work package itself, it's ancestors and children). Instead of using Rails' eager loading which would instantiate a project potentially once for every association path, the code now assigns the same instance to all those associations. Additionally, the commit streamlines the creation of custom field injected representers. Now only one class is created for all work packages when before it would be one class for every uniq set of custom fields. On top of that, the class can be reused if the set of custom fields does not change.
7 years ago
# See docs/COPYRIGHT.rdoc for more details.
improve wp#index performance by eager loading custom actions
7 years ago
#++
module API
module V3
module WorkPackages
introduce custom eager loading for work package list Reduces the amount of AR models instantiated when handing wp#index requests by: * Calculating part of the checksum for caching in the db. This is done by using the id and the updated_at/on field of associated models whose representation is cached in the wp representer. * Reusing instantiated models for multiple associations. e.g instances of Project are used in various places (the work package itself, it's ancestors and children). Instead of using Rails' eager loading which would instantiate a project potentially once for every association path, the code now assigns the same instance to all those associations. Additionally, the commit streamlines the creation of custom field injected representers. Now only one class is created for all work packages when before it would be one class for every uniq set of custom fields. On top of that, the class can be reused if the set of custom fields does not change.
7 years ago
module EagerLoading
class Hierarchy < Base
def apply(work_package)
work_package.association(:children).loaded!
work_package.association(:children).target = children(work_package.id)
improve wp#index performance by eager loading custom actions
7 years ago
end
introduce custom eager loading for work package list Reduces the amount of AR models instantiated when handing wp#index requests by: * Calculating part of the checksum for caching in the db. This is done by using the id and the updated_at/on field of associated models whose representation is cached in the wp representer. * Reusing instantiated models for multiple associations. e.g instances of Project are used in various places (the work package itself, it's ancestors and children). Instead of using Rails' eager loading which would instantiate a project potentially once for every association path, the code now assigns the same instance to all those associations. Additionally, the commit streamlines the creation of custom field injected representers. Now only one class is created for all work packages when before it would be one class for every uniq set of custom fields. On top of that, the class can be reused if the set of custom fields does not change.
7 years ago
private
improve wp#index performance by eager loading custom actions
7 years ago
introduce custom eager loading for work package list Reduces the amount of AR models instantiated when handing wp#index requests by: * Calculating part of the checksum for caching in the db. This is done by using the id and the updated_at/on field of associated models whose representation is cached in the wp representer. * Reusing instantiated models for multiple associations. e.g instances of Project are used in various places (the work package itself, it's ancestors and children). Instead of using Rails' eager loading which would instantiate a project potentially once for every association path, the code now assigns the same instance to all those associations. Additionally, the commit streamlines the creation of custom field injected representers. Now only one class is created for all work packages when before it would be one class for every uniq set of custom fields. On top of that, the class can be reused if the set of custom fields does not change.
7 years ago
def children(id)
@children ||= WorkPackage
.joins(:parent_relation)
.where(relations: { from_id: work_packages.map(&:id) })
.select(:id, :subject, :project_id, :from_id)
.group_by(&:from_id).to_h
improve wp#index performance by eager loading custom actions
7 years ago
introduce custom eager loading for work package list Reduces the amount of AR models instantiated when handing wp#index requests by: * Calculating part of the checksum for caching in the db. This is done by using the id and the updated_at/on field of associated models whose representation is cached in the wp representer. * Reusing instantiated models for multiple associations. e.g instances of Project are used in various places (the work package itself, it's ancestors and children). Instead of using Rails' eager loading which would instantiate a project potentially once for every association path, the code now assigns the same instance to all those associations. Additionally, the commit streamlines the creation of custom field injected representers. Now only one class is created for all work packages when before it would be one class for every uniq set of custom fields. On top of that, the class can be reused if the set of custom fields does not change.
7 years ago
@children[id] || []
improve wp#index performance by eager loading custom actions
7 years ago
end
end
end
end
end
end