logic:iterate & DTO Problem

[Eibhlin Reid]

Does anyone know if it is possible to use <bean:write tag on a collection of DTO objects, within a <logic:iterate tag?

[Horatio Westock]

Yes, you can use logic:iterator to iterate through the collection, then use bean:write to write out info from your DTOs:

  
<logic:iterate id="element" name="mycollection">
  Next element is <bean:write name="element" property="value"/>
</logic:iterate>

or

  
<logic:iterate id="element" name="mybean" property="property_whose_getter_returns_collection">
  Next element is <bean:write name="element" property="value"/>
</logic:iterate>

[Eibhlin Reid]

Thanks for that, we are already using the first piece of code EXACTLY as you gave it:

<logic resent name="topicsList">
<logic:iterate id="topic" name="topicsList" scope="request" >
<bean:write name="topic" property="title"/>
</logic:iterate><br>
</logic resent>

However we are recieveing the following error:
org.apache.jasper.JasperException: Cannot find bean topic in any scope

[Marc Peabody]

Your collection probably contains a null value. If so, you'll have to insert another logic:present for topic inside of the iterate tag.

It wouldn't hurt to try out JSTL's c:forEach for your iterations. Once you try it, you probably won't go back to logic:iterate. Just a suggestion.

[Eibhlin Reid]

Thanks for all your help, as it turned out we were missing a tag at the top of of the JSP!!