This was a reply directly to me which I'm forwarding to the list so future users can leverage the solutions provided in this message.
---- original message ---
Robert,
It is hard to find in the archives, but while I was reading the other messages posted lately I found someone having the same problem and he was redirected to http://www.reumann.net/struts/articles/request_lists.jsp which is exactly what you are explaining me...
I guess I'll change the scope to session - which is probably the easiest way to go for me for now. Hopefully that's not creating other problems...
Struts is a very nice technology, but there is so much to know and to search...
Great list! And nice people always willing to help.
Thanks, BW.
On 1/20/05 2:23 AM, "Robert Taylor" <[EMAIL PROTECTED]> wrote:
>> This is a common and well documented idiom, but can be hard to
>> find in the archives ;)
>>
>> The problem is that to display the form with the select list, you have
>> to prepare the select list before displaying the page.
>>
>> When the user submits the form and validation fails, Struts will forward
>> to the input attribute value in the action mapping. If this value is the
>> .jsp instead of the action url which prepares the .jsp, you get the
>> behavior you describe below.
>>
>> One solution, is to assign the input attribute value to be the
>> preparation action for the page.
>>
>> Another solutions is to place your form in the session and override the
>> form reset() so that your customer list isn't wiped out when you submit
>> the request.
>>
>> Another solution is if your customer list is unique to the user and
>> doesn't change, populate the list and place it in the session when the
>> user logs in and don't put it in the action form at all.
>>
>> Another solution is if your customer list is static and global to all
>> users, populate the customer list on application start up
>> (ServletContextListener or Struts plugin) and place it in the
>> ServletContext as an attribute.
>>
>> hth,
>>
>> /robert
>>
>> Bernard Willemot wrote:
>
>>>> Hi,
>>>>
>>>> Not sure it is the best practice...
>>>>
>>>> I have a for to edit a user called UserForm. This form contains a popup
>>>> (<select>) with Customers.
>>>>
>>>> I didnąt find an easier way to include the data of the popup in the
>>>> UserForm:
>>>>
>>>> Public class UserForm extends ActionForm {
>>>> ....
>>>> protected ArrayList customer_popup;
>>>>
>>>> ....
>>>>
>>>> public ArrayList getCustomerPopup() {
>>>> return this.customer_popup;
>>>> }
>>>>
>>>> public void setCustomerPopup(ArrayList customer_popup) {
>>>> this.customer_popup = customer_popup;
>>>> }
>>>> }
>>>>
>>>> So before editing the user and while building the form, I build the form and
>>>> fill the ArrayList with the customers as well.
>>>>
>>>> So far so good that works, but if I use validation, and the page with the
>>>> form needs be reloading to tell me what went wrong, I have the problem that
>>>> struts doesnąt find the arraylist in the form anymore:
>>>>
>>>> javax.servlet.ServletException: ServletException in
>>>> '/setup/users/edit_user_data.jsp': Failed to obtain specified collection
>>>>
>>>> In the jsp, I use:
>>>>
>>>> <html:select property='customerId'>
>>>> <html:optionsCollection property='customerPopup' label='name'
>>>> value='id' />
>>>> </html:select>
>>>>
>>>> If I remove it, it works fine.
>>>>
>>>>
>>>> Using struts 1.2.4 with TC 5.5.
>>>>
>>>> Any idea?
>>>>
>>>> Thank you, BW.
>>>>
>
>>
>>
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