Rails - Aug 2006 - check_box form helper questions/issues

I''m using Rails 1.1.x and it looks like the check_box form helper 
expects me to provide and object and method so it can determine if the 
checkbox should be checked or not.  I''m having a couple of issues with 
this.

note: I''m using UserEngine and adding a HABTM so that:

class User < ActiveRecord::Base
  has_and_belongs_to_many :foos
end

class foo < ActiveRecord::Base
  has_and_belongs_to_many :users

  def attached?(user = session[:user])
    return false unless users.find(user.id)
  end
end

and in my .rhtml I have this:

<% for foo in @foos %>
  <%= check_box foo, attached? %>
<% end %>

Even if I verify in the console that the current user is in foo''s user 
array, I never get a checked value in my form.

1) I can''t see to tell if foo.attached? is being called
2) If I try and explicitly call foo.attached? in the .rhtml, I get an 
exception that in the call of attached?, user is nil.  So it''s almost 
like session[:user] isn''t in scope during the call.  That seems odd, 
too.
3) Should I dump the helper and write my own .rhtml to render the form? 
If so, I run into (2) again because user is nil

Thoughts?
--dwf









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if you just want to render a checkbox without an object, you could use
check_box_tag instead i believe.

http://api.rubyonrails.com/classes/ActionView/Helpers/FormTagHelper.html#M000500

DWFrank wrote:
> I''m using Rails 1.1.x and it looks like the check_box form helper 
> expects me to provide and object and method so it can determine if the 
> checkbox should be checked or not.
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Posted via http://www.ruby-forum.com/.

Josh Kieschnick wrote:
> if you just want to render a checkbox without an object, you could use
> check_box_tag instead i believe.
Thanks!  The *_tag helpers work more like I expect, allowing full 
expressions for the value/state.

--dwf

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