adding ActionMessages direct from JSP ?

[John Stein]

Hi there,

I'm wondering if there is any way to add an ActionMessage directly from a JSP (as opposed to in the action). Is there any tag based solution to this (I'm not using scriptlets) ?

I tried writing a custom tag solution myself e.g. :



[in handler....]

ActionMessage newMessage = new ActionMessage("my.key.here");
ActionMessages messages = (ActionMessages)pageContext.getRequest().getAttribute(Globals.MESSAGE_KEY);
messages.add("message", newMessage);

[...]

This was throwing an exception at messages.add(), not sure if its because I was adding a message with no value, or if it just can't be done from here.

The key value I was adding was not being looked up in the resource file (not sure if this happens on saveMessages in the action class).

Thanks in advance for any help.

John.

[Merrill Higginson]

Here are a few suggestions:


1- There may or may not be an existing ActionMessages object in the request, so your messages variable may be null. Just instantiate a new one if it's null.

2- When you've added your message to the ActionMessages object, put it in request scope with Globals.MESSAGE_KEY as the key. This isn't necessary if the object was already there, but it is necessary of you're instatiating a new one.
[ January 26, 2006: Message edited by: Merrill Higginson ]

[John Stein]

d'oh ! can't see the wood for the trees scenario!

I was so busy worrying about the underlying complexities of ActionErrors, I didn't check whether the object was already in scope.

Works a charm. Thanks for your help.

Jock.
[ January 27, 2006: Message edited by: John Stein ]