On 9/20/05, Rick Herrick <[EMAIL PROTECTED]> wrote:
> I'm trying to combine displaytag with Spring a somewhat challenging way
> and hope someone out there can shed some light on a problem I'm having.
>
> What I'd like to be able to do is use displaytag to handle displaying a
> table of items. To test the concept, I've adapted the Spring MVC
> step-by-step app at
> http://www.springframework.org/docs/MVC-step-by-step/Spring-MVC-step-by-step.html.
> I've added a property to the Product bean named category and added a few
> products so that I've got 6 products in 3 categories.
>
> For each item (row) in the table, I'll display some properties, very
> standard stuff. I've got this part working and am able to properly
> display my category as a string. So the basic data is fine: I've got a
> category property and it's getting out to the display view properly.
>
> Now the tricky part: I want to use the spring:bind and spring:transform
> tags to convert this data into a drop-down list (i.e., the select tag;
> don't worry about why I need to do this, I just do!). But just binding to
> each object causes an error. For example, I have:
>
> <display:table name="model.products" id="product">
> <display:column property="description"/>
> <display:column property="price"/>
> <display:column title="Category">
> <spring:bind path="product">
> <c:forEach items="${status.errorMessages}" var="error">
> Error code: <c:out value="${error}"/><br/>
> </c:forEach>
> </spring:bind>
> </display:column>
> </display:table>
>
> This gives the following exception: Neither Errors instance nor plain
> target object for bean name 'product' available as request attribute
If you want to use spring:bind, you have to use it in the context of a
SimpleFormController. Are you doing that? If so, is your commandName
"product"?
Matt
>
> It's not that the row object isn't there. I can remove that category
> column and replace it with this:
>
> <display:column title="Category">
> <c:out value="${product.category}"/>
> </display:column>
>
> This displays the product category properly, which means that each object
> extracted from the list by displaytag is properly resolving. I tried
> this, which is a bit left field:
>
> <spring:bind path="model.products[<%=product_rowNum.intValue()%>]">
>
> The idea here was that I could address the collection from the products
> property. This failed pretty badly :^)
>
> What am I missing here? This has to be possible, but I can NOT figure it
> out. The only thing that I can think of is that spring:bind needs a bean,
> meaning I'd need to do something similar to the bean:define tag in Struts,
> but I'm not certain what that would be within Spring.
>
> Any help with this issue would be greatly appreciated!
>
> --
> Rick Herrick
> [EMAIL PROTECTED]
>
> I haven't got time for inner peace.
>
> Get out of control, but appear under control. It's not bad to alarm other
> people, though--it's good for them.--Hunter S. Thompson
>
>
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