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107 lines
3.7 KiB
107 lines
3.7 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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require_relative 'db_worker'
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module Migration
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module LegacyYamler
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##
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# Migrate the given serialized YAML column from Syck to Psych
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# (if any).
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def migrate_to_psych(table, column)
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table_name = ActiveRecord::Base.connection.quote_table_name(table)
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column_name = ActiveRecord::Base.connection.quote_column_name(column)
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fetch_data(table_name, column_name).each do |row|
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transformed = ::Psych.dump(load_with_syck(row[column]))
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ActiveRecord::Base.connection.execute <<-SQL
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UPDATE #{table_name}
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SET #{column_name} = #{ActiveRecord::Base.connection.quote(transformed)}
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WHERE id = #{row['id']};
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SQL
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end
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end
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##
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# Tries to load syck and fails with an error
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# if it was not installed.
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# To continue with the affected migrations, install syck with `bundle install --with syck`
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def load_with_syck(yaml)
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@@syck ||= load_syck
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@@syck.load(yaml)
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end
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private
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def fetch_data(table_name, column_name)
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ActiveRecord::Base.connection.select_all <<-SQL
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SELECT id, #{column_name}
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FROM #{table_name}
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WHERE #{column_name} LIKE '---%'
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SQL
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end
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def load_syck
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require 'syck'
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# WARNING: Syck redefines the YAML constant
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# https://github.com/ruby/syck/commit/9d0c50ca87097b12ce17323c3a4fd1d4066298fc
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Object.class_eval <<-EORB, __FILE__, __LINE__ + 1
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remove_const 'YAML' if defined? YAML
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YAML = ::Psych
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remove_method :to_yaml
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alias :to_yaml :psych_to_yaml
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EORB
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::Syck
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rescue LoadError => e
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##
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# This code will currently never be reached, as our Gemfile installs syck by default
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# for the time being.
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# Our goal is move syck into an optional bundler group, however that feature is still
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# quite young and many of our bundlers do not yet understand its syntax.
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# TODO: Make syck optional or get rid of it completely when feasible.
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abort = -> (str) { abort("\e[31m#{str}\e[0m") }
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abort.call <<-WARN
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It appears you have existing serialized YAML in your database.
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This YAML may have been serialized with Syck, which allowed to parse YAML
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that is now considered invalid given the default Ruby YAML parser (Psych),
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we need to convert that YAML to be Psych-compatible.
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Use `bundle install --with syck` to install the syck YAML parser
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and re-run the migrations.
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WARN
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raise e
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end
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end
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end
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