Ruby Rails column type to MySQL datatype

lifted from PackT.

Migration column type...	Converts to MySQL field type...	Available options1
:binary	TINYBLOB, BLOB, MEDIUMBLOB, or LONGBLOB2	:limit => 1 to 4294967296 (default = 65536)2
:boolean	TINYINT(1)	-
:date	DATE	-
:datetime	DATETIME	-
:decimal	DECIMAL	:precision => 1 to 63 (default = 10) :scale => 0 to 30 (default = 0)3
:float	FLOAT	-
:integer	INT	:limit => 1 to 11 (default = 11)
:primary_key	INT(11) AUTO_INCREMENT PRIMARY KEY	-
:string	VARCHAR	:limit => 1 to 255 (default = 255)
:text	TINYTEXT, TEXT, MEDIUMTEXT, or LONGTEXT2	:limit => 1 to 4294967296 (default = 65536)2
:time	TIME	-
:timestamp	DATETIME	-