change column to allow null

how do I change the column in a table to allow null?

I have

    change_column :docs, :orga, :null

in my migration file but I get an error:

Mysql::Error: You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to
use near 'null DEFAULT '' NOT NULL' at line 1: ALTER TABLE `docs`
CHANGE `orga` `orga null DEFAULT '' NOT NULL

Actually, I had :null=> true

Actually, I had :null=> true

how do I change the column in a table to allow null?

I have

change\_column :docs, :orga,    :null

If you check the docs for change_column you will see that you need the
column type even if it has not changed
change_column :docs, :orga, whatever_type_it_is :null=>true

Colin

cool thanks