Assuming you have Stripersist working correctly, the URL should be
http://localhost:8080/app/ItemDetail.action?item=10
And you should remove the "id" property from your ActionBean altogether. The
power of Stripersist is binding entities directly. You don't have to think
about IDs at all.
-Ben
On Mon, Mar 23, 2009 at 11:56 AM, AK <ama-l...@mltp.com> wrote:
> Ben Gunter <gunter...@...> writes:
>
> > That's a really bad idea, for several reasons. First and foremost, you
> open
> yourself up to an SQL injection attack whenever you take a value from a
> request
> parameter and embed it directly into a query string without at least
> sanitizing
> it first. (In this particular case, you're protected by the fact that the
> field
> is an int instead of a String. There may also be some additional protection
> by
> using JPA instead of JDBC, but it's still bad practice.) You really should
> be
> using named or positional parameters in your query, like so:
> > Stripersist.getEntityManager() .createQuery("from Item where id
> = :id") .setParameter("id", id) .getSingleResult()
>
> Ben -- Thanks so much for this great feedback. I was just looking through
> some
> old posts and saw your reply and have updated my code based on your
> suggestion. Please see below...
> > Secondly, when looking up an entity by its ID using JPA, you should use
> EntityManager.find(..) to do so.
> > Stripersist.getEntityManager().find(Item.class, id)
> >
> > And finally, you don't have to do any of this at all because Stripersist
> will
> handle it for you if you set things up correctly. Declare your Item as a
> field
> of your ActionBean (with getter and setter), pass in a parameter with the
> same
> name as the Item property and the Item will magically appear, thanks to
> Stripersist's TypeConverter.
> > private Item item;public Item getItem() { return item; }public void
> setItem
> (Item item) { this.item = item; } <at> DefaultHandlerpublic Resolution
> view()
> { // No need to do anything. The item is already there!}
> >
> > If you pass in a request parameter item=123 then the Item entity with ID
> 123
> will be there when your handler executes.-Ben
>
> This is super intriguing, but this part has me stumped! This is what my
> action
> now looks like per your comments above:
>
>
> public class ItemDetailActionBean extends BaseActionBean {
>
> private final static String VIEW = "/WEB-INF/jsp/item_detail.jsp";
> ...
> private Item item;
> private int id; // this is passed in from the JSP
>
> @DefaultHandler
> public Resolution view() {
> logger.debug("*** in view()");
> logger.debug("*** id: " + id);
>
> // commented this out per your suggestion
> /*
> item = (Item)Stripersist.getEntityManager()
> .createQuery("FROM Item WHERE id = :id")
> .setParameter("id", id)
> .getSingleResult();
> */
>
> return new ForwardResolution(VIEW);
> }
> ...
>
> public Item getItem() {
> return item;
> }
>
> public void setItem(Item item) {
> this.item = item;
> }
>
> public int getId() {
> return id;
> }
>
> public void setId(int id) {
> this.id = id;
> }
> }
>
> However, when I try to pull out any of the item details within the JSP, I
> get
> nothing! Here's my JSP:
>
> ...
> <c:if test="${not empty actionBean.item}">
> date: <fmt:formatDate type="date" dateStyle="full"
> value="${actionBean.item.dateFound}"/><br/>
> name: ${actionBean.item.name}<br/>
> description: ${actionBean.item.desc}<br/>
> </c:if>
>
> The URL that gets called to kick of this action beam (w/ the param) looks
> like
> this:
>
> http://localhost:8080/app/ItemDetail.action?id=10
>
> What am I doing wrong that I can keep my view empty, and not tell it
> how/where
> to go to the DB to get the ID I'm looking for, and still get back what I
> need?
>
>
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> Stripes-users mailing list
> Stripes-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/stripes-users
>
------------------------------------------------------------------------------
Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
easily build your RIAs with Flex Builder, the Eclipse(TM)based development
software that enables intelligent coding and step-through debugging.
Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
_______________________________________________
Stripes-users mailing list
Stripes-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/stripes-users
