Hi Matt,
On 21 Oct 2007 at 11:43, Matt Raible wrote:
> Does your Product class have a getId() method?
It inherits one - Product extends my BaseEntity class which has the
following:
@MappedSuperclass
public abstract class BaseEntity extends BaseObject implements
Serializable {
private Long id = null;
/**
* @return the id
*/
@Id @GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
<.. more stuff ..>
This works fine with my other POJOs that also inherit from it and currently
use the Generic Daos, Managers etc.
> On 10/21/07, Rob Hills <[EMAIL PROTECTED]> wrote:
> > Hi All,
> >
> > I have a weird error on a Listing JSP that's had me stumped for several
> > hours.
> >
> > I have a POJO named "Product" and have built associated ProductDao,
> > ProductDaoHibernate, ProductManager, ProductManagerImpl
> > and ProductAction classes, as well as tests for Dao, Manager and Action.
> > I have a ProductList.jsp and I believe I've correctly configured all the
> > "glue" bits (bean defninitions in applicationContext.xml, action
> > definitions in struts.xml etc.).
> >
> > All tests pass OK and the web app starts up (Jetty + HSQLDB).
> >
> > However, when I go to view my products list, I get a blank page and the
> > following error:
> >
> > [myapp] WARN [btpool0-1] LookupUtil.<init>(99) | Exception: [.LookupUtil]
> > Error looking up property "id" in object type
> > "java.lang.String". Cause: Unknown property 'id'
> > java.lang.NoSuchMethodException: Unknown property 'id'
> > at
> > org.apache.commons.beanutils.PropertyUtilsBean.getSimpleProperty(PropertyUtilsBean.java:1122)
> > at
> > org.apache.commons.beanutils.PropertyUtils.getSimpleProperty(PropertyUtils.java:408)
> > at org.displaytag.util.LookupUtil.getProperty(LookupUtil.java:271)
> > at
> > org.displaytag.util.LookupUtil.getBeanProperty(LookupUtil.java:129)
> > at org.displaytag.model.Column.getValue(Column.java:124)
> > at
> > org.displaytag.model.Column.createChoppedAndLinkedValue(Column.java:201)
> > at org.displaytag.model.Column.initialize(Column.java:178)
> > at
> > org.displaytag.render.TableWriterTemplate.writeTableBody(TableWriterTemplate.java:313)
> > at
> > org.displaytag.render.TableWriterTemplate.writeTable(TableWriterTemplate.java:138)
> > at
> > org.displaytag.render.HtmlTableWriter.writeTable(HtmlTableWriter.java:643)
> > at org.displaytag.tags.TableTag.writeHTMLData(TableTag.java:1557)
> > at org.displaytag.tags.TableTag.doEndTag(TableTag.java:1206)
> > at
> > org.apache.jsp.WEB_002dINF.pages.admin.productList_jsp._jspService(org.apache.jsp.WEB_002dINF.pages.admin.productList_jsp:
> > 206)
> > <.. lots more ..>
> >
> > Unfortunately, at no point does the stacktrace drop into any of my own
> > classes, nor do any of my debug messages appear.
> >
> > The following snippet is from my ProductList.jsp:
> >
> > <c:set var="products" value="products" scope="request"/>
> > <display:table name="products" class="table" requestURI="" id="productList"
> > export="true" pagesize="25">
> > <display:column property="id" sortable="true"
> > href="editProduct.html" media="html"
> > paramId="id" paramProperty="id" titleKey="product.id"/>
> > <display:column property="id" media="csv excel xml pdf"
> > titleKey="product.id"/>
> > <display:column property="name" sortable="true"
> > titleKey="product.name"/>
> > <.. lots more ..>
> >
> > My initial interpretation of the error message is that the "products" list
> > being returned by the c:set line in the jsp is actually coming in as
> > a list of strings and the server is complaining that the first String
> > doesn't contain an ID (which it wouldn't of course). However, I've been
> > back through my classes and the relevant methods are definitely returning
> > List<Product>.
> >
> > The first line of my ProductAction.list() method is a log.debug call that
> > never prints to the log so I'm at a loss to figure out what's going
> > on.
> >
> > Has anyone else seen anything like this before? Any thoughts on what might
> > be causing this problem, or where I should look?
Cheers,
Rob Hills
Waikiki, Western Australia
Mobile +61 (412) 904-357
Fax: +61 (8) 9529-2137
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