Hi. I am having a problem with the "input" attribute to an "action" in the
action-mapping in my struts-config.xml:
<action name="addedit_subtypes"
path="/addedit_subtypes"
type="gov.faa.infra.irequest.web.action.AddEditSubTypesAction"
input="/addedit_subtypes.jsp">
<forward name="show.edit" path="/addedit_subtypes.jsp"></forward>
<forward name="show.add" path="/addedit_subtypes.jsp"></forward>
<forward name="added" path="/view_subtypes.do"></forward>
<forward name="updated" path="/view_subtypes.do"></forward>
</action>
This action has a dual purpose; it adds new and edits existing subtypes. Let's only
focus on the editing portion now, but I get the same error when adding.
The first time addedit_subtypes.do is called, it will be passed a primary key to a
subtype to edit -- the ActionForm is populated with the PK. The action uses the PK to
look up a subtype object. Then the action calls the data layer to get a list of all
users and sets the Collection returned to the request attribute "userList". The
display of the subtype to edit works just fine.
When the user edits the subtype and clicks save, an "action=save" attribute is passed
and there are no problems saving the edited subtype...unless there is a
ActionForm.validate() error. If one of the fields is empty then a new ActionError
object is placed in the ActionErrors. The input of the action is
"addedit_subtype.jsp." When the page forwards to the JSP, the Action.execute() method
is not called, however this is the method that pulls the list of users. When the JSP
is called, an error is thrown because "userList" has not been defined. I could use the
<logic:present> tag to avoid the error, but then the list
of users would not be presented to the user.
How can I ensure that "userList" will be set even if the validate() method returns
with errors?
Thanks for your help,
Michael.
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