Rails - Jul 2009 - help passing an id from a collection_select to my method

Help, I''m trying to pass a course_id from a collection_select and
can''t figure out how to do it.

If I hard-code my method:

def move_stu
  Enrollment.update_all(["course_id = ?", "12" ],
:student_id => params
[:student_ids])

  ##
end

It works perfectly. The enrollment updates the student''s course_id to
12.

Instead of hard-coding it, I''d like users to be able to select the
course they want to move the student to. My collection_select looks
like this (and I don''t get any errors):

<%= collection_select(:student, :course_id,
current_user.courses, :id, :name, :include_blank => true) %>

BUT I haven''t been able to pass :id to the move_stu method.
I''ve tried
this:

def move_stu
  Enrollment.update_all(["course_id = ?", id ], :student_id =>
params
[:student_ids])

  ##
end

but all that passes in is a random 8 digit id from ??? (not the :id
from the collection_select)

Any ideas??? thank you in advance!

On Jul 30, 9:54 am, D <demetri...-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org>
wrote:s:
>
> def move_stu
>   Enrollment.update_all(["course_id = ?", id ], :student_id =>
params
> [:student_ids])
>
>   ##
> end
>
> but all that passes in is a random 8 digit id from ??? (not the :id
> from the collection_select)
>
The id you are using there is the id of the current controller
instance. Just as you pick the student_id out of the params hash, the
course will be somewhere in params too. If you look in your
development.log or play around in the debugger you should be able to
figure out where in the params hash it is.

Fred
> Any ideas??? thank you in advance!