logic:iterate question

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Ming - 26 Nov 2007 03:17 GMT

logic:iterate question
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Minghui Yu to Struts

show details 6:58 PM (19 minutes ago)

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in Action:
...
Set<Book> books=bdao.findAllBooks();
request.setAttribute("books", books);
...

In JSP:

<logic:present name="books">
All Books: 
<logic:iterate id="book" name="books">
<bean:write name="book" property="title" /> 
</logic:iterate>
</logic:present>
--

The line ( <bean:write name="book" property="title" /> throws an
exception:

Root Cause:
javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot
find bean: "book" in any scope

(there is getTitle method for Book)

Any idea why I made mistake?

Thanks,

Thanks & Have a good day,

YU, Minghui
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Ming - 26 Nov 2007 03:40 GMT

> logic:iterate question
> Reply to all
[quoted text clipped - 50 lines]
>
> Forward

Tried code below, same error"

<logic:present name="books">
All Books: 

<logic:notEmpty name="books">
<logic:iterate id="book" name="books" indexId="cnt">
Next element is <bean:write name="book" property="title"/>
</logic:iterate>
</logic:notEmpty>

<logic:empty name="books">
Database search does not return any result
</logic:empty>

</logic:present>

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S O H I L - 26 Nov 2007 06:34 GMT

hi,
pls set the variable scope to session in struts config
and set the variable in session

Set<Book> books=bdao.findAllBooks();
session.setAttribute("books", books);

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Lew - 26 Nov 2007 14:13 GMT

> hi,
> pls set the variable scope to session in struts [sic] config
> and set the variable in session
>
> Set<Book> books=bdao.findAllBooks();
> session.setAttribute("books", books);

Why is that necessary?

Struts tags are supposed to be able to find request attributes, too.

Personally, I'd use standard tags; even Struts dropped those tags in its
current version.

Anyhow, the problem wasn't with finding the "books" bean, it was with finding
the "book" bean.

Signature

Lew

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Manish Pandit - 26 Nov 2007 22:27 GMT

> The line ( <bean:write name="book" property="title" /> throws an
> exception:
[quoted text clipped - 15 lines]
>
> Forward

The scope should be fine, as book bean should be created under page
scope, accessible to bean:write. I agree with Lew on using standard
tags, which would make this a lot easier with EL.

Are you sure the struts-bean TLD is delcared in the JSP? How about you
try to use bean:write with some other variable outside of the
logic:iterate and see if that works?

-cheers,
Manish

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logic:iterate question

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