Re: Parameter passing in URL

Hi Mathew,

thanks for the help (and sorry for the delay in answering). That's a
good idea and I followed your advise, but still one problem persists:
If, in step 3 there is something wrong in validation, cake will return
to the form again. But now, the ID is no longer in the URL, so there is
an error about that.

I think, passing a parameter along the URL is a pretty common task,
isn't it? There should be more support for that in cake. For example, if
I add it to the form action (helper), cake gets all confused about it.
Yet, that would be the simplest solution.

Best Regards,
Daniel Süpke

Mathew wrote:
> Hi Daniel,
>
> You want to include the ID in the URL so that it persists when
> bookmarked, and using a session doesn't provide that feature.
>
> I understand what your trying to do, but the form action does not
> require the ID to be included, because posted form requests first
> require an HTML page to display the form.
>
> Let me example.
>
> 1) User follows a link with the ID.
> 2) HTML with the form is shown in the browser, with the ID in the URL.
> 3) User enters form data, and submits the form.
> 4) A response from the server is shown to the user.
>
> In step #2 when the form is displayed. You should take the ID from the
> URL and add it as a hidden field in the form.
> In step #3 the action that handles the form request does not need the
> ID in the URL because it will be in the posted data.
> In step #4 as part of the response you redirect the user to a URL that
> contains the ID.
>
> Also.
>
> I would create a simple Helper object for your views. Not one that
> creates an HTML link, because Cake comes with Form and Html helpers to
> do that. All you need to do is modified a Router array to include the
> ID
>
> for example;
>
> $html->link('Somewhere',$myhelper-
>> id(array('controller'=>'documents','action'=>'show')));
>
> You create a helper called Myhelper, and add a function called "id"
> that injects your ID from the URL into the array. Now you can call all
> various helper objects that require routed links.
>
> I think you can inject the ID as a get request like this (I can't
> remember how to handle gets with params, but I think its like this)
>
> function id( $arr )
> {
> $arr['?'] = array('id'=>$this->params['id']);
> }
>
> That should provide Html that looks like this in your view
>
> <a href="/documents/show?id=#####">Somewhere</a>
>

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