- Re: Action argument is null when it shouldn 't be nul

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- Re: Action argument is null when it shouldn 't be nul

- Re: Action argument is null when it shouldn 't be nul

2007-07-17 - By michaelcourcy

Back

Reply: << 11 12

"grettke_spdr" wrote : This code from the sample works just fine though:
|
| <s:link id="viewHotel" value="View Hotel" action="#{hotelBooking
.selectHotel(hot)}"/>

Yes I ran into this problem until I unserstand that a link is a link and a post
is a post ;)

Wich means that using such expression

| <s:link id="viewHotel" value="View Hotel" action="#{hotelBooking
.selectHotel(hot)}"/>
|

make sens only if the #{hotelBookings} collection exist in one the available
scope.

in you watch carefully the Scope of #{hotelBookings} in the seam-books example,
it's a session scope.

It's really consistent, as you can engage many convesations inside a session.
Session is the container of many conversations. Engaging many conversations
without a session that reference them don't make sens.

When you use s:link with a one argument method you're passing a reference to an
obect but you don't post this object.

But I agree on the fact that it would be more helpful if we could have an error
message like : this object could not be found in any scopes (similar to struts)
than having the method executed with a null argument.

I can't figure out in wich situation a developper would write

| <s:link id="viewHotel" value="View Hotel" action="#{hotelBooking
.selectHotel(hot)}"/>
|

and expecting "hot" to be null !

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic
&p=4065164#4065164

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode
=reply&p=4065164
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