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110 lines
3.9 KiB
110 lines
3.9 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is an open source project management software.
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# Copyright (C) 2012-2020 the OpenProject GmbH
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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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# When included, it adds the ability to rebuild nested sets, thus fixing
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# corrupted trees.
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#
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# AwesomeNestedSet has this functionality as well but it fixes the sets with
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# running the callbacks defined in the model. This has two drawbacks:
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#
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# * It is prone to fail when a validation fails that has nothing to do with
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# nested sets.
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# * It is slow.
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#
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# The methods included are purely sql based. The code in here is partly copied
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# over from awesome_nested_set's non sql methods.
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module OpenProject::NestedSet::RebuildPatch
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def self.included(base)
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base.extend(ClassMethods)
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end
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module ClassMethods
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# Rebuilds the left & rights if unset or invalid. Also very useful for converting from acts_as_tree.
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# Very similar to original nested_set implementation but uses update_all so that callbacks are not triggered
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def rebuild_silently!(roots = nil)
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# Don't rebuild a valid tree.
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return true if valid?
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scope = lambda { |_node| }
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if acts_as_nested_set_options[:scope]
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scope = lambda { |node|
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scope_column_names.inject('') {|str, column_name|
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str << "AND #{connection.quote_column_name(column_name)} = #{connection.quote(node.send(column_name.to_sym))} "
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}
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}
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end
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# setup index
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indices = Hash.new do |h, k|
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h[k] = 0
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end
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set_left_and_rights = lambda { |node|
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# set left
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node[left_column_name] = indices[scope.call(node)] += 1
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# find
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children = where(["#{quoted_parent_column_name} = ? #{scope.call(node)}", node])
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.order([quoted_left_column_name,
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quoted_right_column_name,
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acts_as_nested_set_options[:order]].compact.join(', '))
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children.each do |n| set_left_and_rights.call(n) end
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# set right
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node[right_column_name] = indices[scope.call(node)] += 1
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changes = node.changes.inject({}) { |hash, (attribute, _values)|
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hash[attribute] = node.send(attribute.to_s)
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hash
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}
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where(id: node.id).update_all(changes) unless changes.empty?
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}
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# Find root node(s)
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# or take provided
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root_nodes = if roots.is_a? Array
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roots
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elsif roots.present?
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[roots]
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else
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where("#{quoted_parent_column_name} IS NULL")
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.order([quoted_left_column_name,
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quoted_right_column_name,
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acts_as_nested_set_options[:order]].compact.join(', '))
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end
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root_nodes.each do |root_node|
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set_left_and_rights.call(root_node)
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end
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end
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end
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end
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