We are trying to use <logic:iterate> in a JSP to access items in a list
stored in the Form Bean by the Action class but we can't seem to get the
syntax right.
I am getting an error meessage from PropertyUtils that displays the index as
'${index}', which indicates that that struts el expression is not resolving
to an int.
Here is my exact syntax. The form and action are described in more detail
below.
<html:form action="/test">
<logic:iterate id="lineItem" indexId="index" name="testForm"
property="list">
<!-- display the index counter for the fun of it. This works
ok -->
<bean:write name="index" /><br>
<!-- now access the id of the indexth element of the list
-->
<bean:write name="list[${index}].id" /><br>
<!-- now access the description of the indexth element of
the list -->
<html:text property="list[${index}].description"
onchange="changefield(this);"/><br>
<html:hidden property="isChanged[${index}]" /><br>
</logic:iterate>
<html:submit>Send</html:submit>
</html:form>
I have created several Test classes to help me understand the flow...
The form is an instance of TestForm exends ActionForm and its form name in
struts-config.xml is "testForm". (This is the named form for the action.)
TestForm has one property: java.util.List list with accessors public List
getList() and public void setList(List list).
List is always a List of LineItem objects where LineItem is a simple
JavaBean with properties
String id (public String getId() and public void setId(String id)), String
description (public String getDescription() and public void
setDescription(String description)) and boolean isChanged (public void
setIsChanged(boolean value) and public boolean getIsChanged() )
The Action (TestAction extends Action) "execute" method creates a List of 5
LineItem objects and stores that List into the form by calling
((TestForm)form).setList(list), then forwards to the jsp (test.jsp)
In the jsp I would like to iterate through the list to perform the
following:
display the id (as html read-only text) and the
description (as html:text) of each line item,
then use JavaScript to change the "isChanged" property (in a hidden field)
when the onchange event is triggered.
I have tried several different syntaxes. I also tried using arrays instead
of List's. I also specified the type of the LineItem class explicitly in the
form element. I tried each of the "html:" and "bean:write" lines above one
at a time to see if any would be successful, but they all produce that same
error. I have combed the web for a good example of how to accomplish this,
but I couldn't find anything that handled things in a way that would work
for us.
Can you tell me what I am doing wrong and how to accomplish the access?
Thanks/Victor
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