I am use ROR v= 2.3.4 in my console. i found a strange query SELECT * FROM [Primary Key(id)] = 0, because of i had changed the id[Primary Key] from int to varchar. ruby on rails still query the db on int like 0 use int not '0'. such kind query cost too much db resource. and i don't konw how to prevent such query. please help.
on 2012-11-28 11:14