Rails - Oct 2005 - Does change_column supports changing NULL constrains?

I am trying to write migration that removes NOT NULL constraint from column.
Something like this

TABLES = [:tab1, :tab2, :tab3]

def self.up
TABLES.each{|t|
change_column(t, :type, :integer, :null => true)
}
end

But nothing happens after ''rake migrate'' . NOT NULL constrains
still present
in db. Does changing null constrains supported by migrations?

I am using ror from beta gems. rev 2471

--
anatol


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