OpenProject is the leading open source project management software.
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openproject/app/services/authorization/abstract_query.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2020 the OpenProject GmbH
#
# 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.
#++
class Authorization::AbstractQuery
class_attribute :model
class_attribute :base_table
def self.query(*args)
arel = transformed_query(*args)
model.unscoped
.joins(joins(arel))
.where(wheres(arel))
.distinct
end
def self.base_query
Arel::SelectManager
.new(nil)
.from(base_table || model.arel_table)
end
def self.transformed_query(*args)
run_transformations(*args)
end
class_attribute :transformations
self.transformations = ::Authorization::QueryTransformations.new
def self.inherited(subclass)
subclass.transformations = transformations.copy
end
def self.run_transformations(*args)
query = base_query
transformator = Authorization::QueryTransformationVisitor.new(transformations: transformations,
args: args)
transformator.accept(query)
query
end
def self.wheres(arel)
arel.ast.cores.last.wheres.last
end
def self.joins(arel)
arel.join_sources
end
end