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if ActiveRecord::Base.connection.instance_of?(ActiveRecord::ConnectionAdapters::MysqlAdapter)
class ChangeIdsToUnsigned < ActiveRecord::Migration
def up
# accounts
execute "ALTER TABLE accounts " +
"MODIFY user_id bigint unsigned NOT NULL"
# tweets
execute "ALTER TABLE tweets " +
"MODIFY user_id bigint unsigned NOT NULL, " +
"MODIFY in_reply_to_id bigint unsigned DEFAULT NULL"
# favorites
execute "ALTER TABLE favorites " +
"MODIFY user_id bigint unsigned NOT NULL, " +
"MODIFY tweet_id bigint unsigned NOT NULL"
# retweets
execute "ALTER TABLE retweets " +
"MODIFY user_id bigint unsigned NOT NULL, " +
"MODIFY tweet_id bigint unsigned NOT NULL"
end
def down
# accounts
execute "ALTER TABLE accounts " +
"MODIFY user_id bigint NOT NULL"
# tweets
execute "ALTER TABLE tweets " +
"MODIFY user_id bigint NOT NULL, " +
"MODIFY in_reply_to_id bigint DEFAULT NULL"
# favorites
execute "ALTER TABLE favorites " +
"MODIFY user_id bigint NOT NULL, " +
"MODIFY tweet_id bigint NOT NULL"
# retweets
execute "ALTER TABLE retweets " +
"MODIFY user_id bigint NOT NULL, " +
"MODIFY tweet_id bigint NOT NULL"
end
end
end
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