Active Records with column privilages

Hey I am making applications that has different DB roles to the same
database. One is pretty much the admin access where the person can see
all the columns in each table, then there is the regular joe DB role
where I don't let him see confidential information that only admin can
see, for security purposes, so I put column privileges on that role. The
problem with that is the fact that Rails do not see these privileges set
by the DB and Rails gets all the columns in a table. I do not want it to
do that. I wish to prevent those columns from showing in the model. Is
this possible?