OpenProject is the leading open source project management software.
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openproject/db/migrate/20211005080304_tzinfo_time_...

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#-- encoding: UTF-8
#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2021 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) 2006-2013 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 COPYRIGHT and LICENSE files for more details.
#++
class TzinfoTimeZones < ActiveRecord::Migration[6.1]
def up
zone_mappings = ActiveSupport::TimeZone
.all
.map do |tz|
[
[tz.name, tz.tzinfo.canonical_zone.name],
# Some entries seem to already be in that format so we leave them unchanged
[tz.tzinfo.canonical_zone.name, tz.tzinfo.canonical_zone.name]
]
end
.flatten(1)
migrate_user_time_zone(zone_mappings)
migrate_default_time_zone(zone_mappings)
end
def down
zone_mappings = ActiveSupport::TimeZone
.all
.map do |tz|
[tz.tzinfo.canonical_zone.name, tz.name]
end
migrate_user_time_zone(zone_mappings)
migrate_default_time_zone(zone_mappings)
end
protected
def migrate_user_time_zone(mappings)
execute <<~SQL.squish
WITH source AS (
SELECT id, settings || jsonb_build_object('time_zone', to_zone) settings
FROM user_preferences
LEFT JOIN (SELECT * FROM (#{Arel::Nodes::ValuesList.new(mappings).to_sql}) as t(from_zone, to_zone)) zones
ON zones.from_zone = user_preferences.settings->>'time_zone'
)
UPDATE user_preferences sink
SET settings = source.settings
FROM source
WHERE source.id = sink.id
AND sink.settings->'time_zone' IS NOT NULL
SQL
end
def migrate_default_time_zone(mappings)
execute <<~SQL.squish
WITH zones AS (
SELECT * FROM (#{Arel::Nodes::ValuesList.new(mappings).to_sql}) as t(from_zone, to_zone)
)
UPDATE settings
SET value = zones.to_zone
FROM zones
WHERE settings.name = 'user_default_timezone'
AND settings.value = zones.from_zone
SQL
end
end