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# frozen_string_literal: true
# rubocop:disable Style/Documentation
module Gitlab
module BackgroundMigration
class MigrateUsersBioToUserDetails
class User < ActiveRecord::Base
self.table_name = 'users'
end
class UserDetails < ActiveRecord::Base
self.table_name = 'user_details'
end
def perform(start_id, stop_id)
relation = User
.select("id AS user_id", "substring(COALESCE(bio, '') from 1 for 255) AS bio")
.where("(COALESCE(bio, '') IS DISTINCT FROM '')")
.where(id: (start_id..stop_id))
ActiveRecord::Base.connection.execute <<-EOF.strip_heredoc
INSERT INTO user_details
(user_id, bio)
#{relation.to_sql}
ON CONFLICT (user_id)
DO UPDATE SET
"bio" = EXCLUDED."bio";
EOF
end
end
end
end
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