How to pass parameters

[nicoladf]

Hi guys,
just a simple question that seems unanswered on RoR books, I just
skimmed 4 of them. I've a Contact model and I've a Note model. Now I
want a link on the page that shows the contact enabling the user to add
a new note for that contact.
Now on the contact page I want to place an 'add note'. I want the user
to write the note on a separate page. How can I pass the ID of the
contact to the page? Where should I place this ID in the form for the
note? (a hidden field?, is there an helper for this?) How should I write
the action to store this note, I mean how can I distinguish the note ID
from the contact ID?
At the end I've a great doubt, am I completely wrong and should I change
the way to develop in RoR? This last question is even more important so
if the right way to do what I'm asking is different please tell me.

Thank you.

[Fenrir2]

You can pass additional parameters to link_to:

link_to "add note", :controller => "notes", :action => "new", :contact_id => @contact.id

You can extract it from the params hash like this:

params[:contact_id]

Then you put it in a hidden_field for the "create" action. The name of the note id in the notes-controller is simply "id". The name of the contact is "contact_id".

[nicoladf]

Thank you Fenrir2, now it works.