Cheers folks, i added 

$this->data['Course']['user_id'] = $this->Session->read('Auth.User.id');

to my controller from euromark's responce and it worked perfectly thanks very 
much everyone.

Paul

On 2 Feb 2011, at 18:12, Stephen wrote:

> Definately go with euromark's answer, Ed is correct in his, but like he says 
> it can be manipulated (just for emphasis)
> 
> On 2 February 2011 18:07, Ed Propsner <[email protected]> wrote:
> I'd go with euromark's answer :) He's right about the field being easily 
> manipulated. 
> 
> 
> On Wed, Feb 2, 2011 at 1:03 PM, Ed Propsner <[email protected]> wrote:
> A hidden field could accomplish exactly what you are looking to do. 
> 
> $form->input('User.user_id', array('type' => 'hidden', 'value' => 
> $this->Session->read('Auth.User.id')); 
> 
> The user id will accessible in your controller through $this->data
> 
> HTH
> 
> On Wed, Feb 2, 2011 at 12:53 PM, Paul Wheatley <[email protected]> 
> wrote:
> Hello,
> 
> I have a add view that you have to be logged in to get to.
> 
> What i am trying to do is add the UserID of the person creating the record to 
> the table so that later i can display only posts that relate to him/her.  I 
> have a field called user_id and sort of hoped that Cake would do a similar 
> thing to "created" and just fill it in but alas no.
> 
> I think what i need to do is create a hidden field in my form thats value is 
> generated from the Auth session data but i am not sure how to go about it.
> 
> Can anyone help?
> 
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