discourse/db/migrate/20211213060445_email_tokens...

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# frozen_string_literal: true
class EmailTokensTokenToNullable < ActiveRecord::Migration[6.1]
def up
# ensure column is nullable in case any inserts happen
# prior to post migrations
#
# using this somewhat verbose pattern to avoid impacting people who
# drifted on main
begin
Migration::SafeMigrate.disable!
if DB.query_single(<<~SQL).length > 0
SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_schema='public'
AND table_name = 'email_tokens'
AND column_name = 'token'
SQL
execute <<~SQL
ALTER TABLE email_tokens ALTER COLUMN token DROP NOT NULL
SQL
end
ensure
Migration::SafeMigrate.enable!
end
end
def down
# do nothing, does not matter
end
end