Re: jsp page with s:action to call an action with a redirect-action
Hi! On Wed, Apr 30, 2008 at 2:21 AM, crappycrumpet <[EMAIL PROTECTED]> wrote: > Ralf Fischer-2 wrote: > > > > Please tell us exactly what you want to do, as there might be a > > simpler solution to your problem. > > > > Okay I don't have hibernate and this is what I'm sort of doing. Let's say > that I have a table of staffs, offices and things_assignment (which links > staffs and stuff to offices and whatever). I'm displaying rows of staffs > with the office they are assigned to. There are many solution to this... I > mean I can write an sql to grab the property as well as the staff and dump > them in a Staff object that has property object inside it (and whatever else > that can be assigned to a staff), that would make sense I just want to keep > things separate. That's fine. > Ralf Fischer-2 wrote: > > As your workaround seems to be to "invoke back" actionA from your > > example, I guess there's another result for actionA which then renders > > the data which results from actionB into the page. > > This can either be > > done using the action chaining (which seems to be discouraged as I've > > learned from this maling list) where you don't have to invoke the > > action from the JSP but as a result directly, or simply render the > > data inside the action tag, doing something like this: > > | > > | > > | > > > > Yes actionA finds record A from a field in record B which is fetch from > actionB, and actionA displays the 'name' attribute from a. ActionA from > actionB was only called once so there's no 'invoke back'. > So the intention originally was actionB renders nothing but redirect to > actionA which renders something, which works when called directly to actionB > but when actionB is called from part of a JSP (say when I'm rendering rows > of objects C and want to display object A's name in one of the column, which > is associated to C via object B's CId [b.id I mentioned before was meant to > be b.CId] and blahId), but when I actually try that it doesn't move to > actionA after performing actionB. Hum. So you use action B just to get Objects of type B and don't render anything else. This surely can be done with actions but IMO is most likely not the way they were intended to use. If you don't use Hibernate, as you mentioned above, could this relation not be resolved in one simple join within the select statement? Surely it would perform better. I always implement action according to the actions a user wants to perform on the page, almost always this are the typical use cases which you have on the page (e.g. "login", "send message to friend", "list staff"). To me it looks like you are trying ot wrap your entities with actions, like you have actions as "read staff", "read offices" and "read thing_assingment". This is of course a good way to do things if you want to create pages to view lists of each of the tables, or display a detail view on each item of the object in question, but it doesn't mean that the office action must not select data from the staff entity to display the staff currently located there. This is why entity handling/mapping is usually done in some entity beans or DAO classes which can easily be invoked from arbitrary actions. > I was looking at action chaining and the page say to use 'redirect' or > 'redirectAction' instead which is the approach I chose but it didn't do what > I thought it would. > > Anyhow the workaround works I'm more just curious as to why redirect-action > doesn't work in this instance. I mean surely not all executeResult set to true would render a separate HTTP header right? ... > or do they? The redirect results work just fine as long as you don't invoke the action resulting in a redirect from inside another result, e.g. a JSP page. As mentioned in my last mail you cannot redirect a request easily once JSP rendering has started which is usually the case when the tag is executed, as it's embedded inside such a result which leads to rendering the HTTP header and the HTTP response body afterwards. There are ways to do this, but I wouldn't recommend it anyway. In this instance it seems you either have to restructure your actions, make use of the result rendering inside the tags' body, or have no other choice than to use action chaining. Bye, -Ralf - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: jsp page with s:action to call an action with a redirect-action
Hi Ralf, Ralf Fischer-2 wrote: > > Please tell us exactly what you want to do, as there might be a > simpler solution to your problem. > Okay I don't have hibernate and this is what I'm sort of doing. Let's say that I have a table of staffs, offices and things_assignment (which links staffs and stuff to offices and whatever). I'm displaying rows of staffs with the office they are assigned to. There are many solution to this... I mean I can write an sql to grab the property as well as the staff and dump them in a Staff object that has property object inside it (and whatever else that can be assigned to a staff), that would make sense I just want to keep things separate. Ralf Fischer-2 wrote: > > As your workaround seems to be to "invoke back" actionA from your > example, I guess there's another result for actionA which then renders > the data which results from actionB into the page. > This can either be > done using the action chaining (which seems to be discouraged as I've > learned from this maling list) where you don't have to invoke the > action from the JSP but as a result directly, or simply render the > data inside the action tag, doing something like this: > | > | > | > Yes actionA finds record A from a field in record B which is fetch from actionB, and actionA displays the 'name' attribute from a. ActionA from actionB was only called once so there's no 'invoke back'. So the intention originally was actionB renders nothing but redirect to actionA which renders something, which works when called directly to actionB but when actionB is called from part of a JSP (say when I'm rendering rows of objects C and want to display object A's name in one of the column, which is associated to C via object B's CId [b.id I mentioned before was meant to be b.CId] and blahId), but when I actually try that it doesn't move to actionA after performing actionB. I was looking at action chaining and the page say to use 'redirect' or 'redirectAction' instead which is the approach I chose but it didn't do what I thought it would. Hope I'm making sense here... Anyhow the workaround works I'm more just curious as to why redirect-action doesn't work in this instance. I mean surely not all http://www.nabble.com/jsp-page-with-s%3Aaction-to-call-an-action-with-a-redirect-action-tp16951812p16973314.html Sent from the Struts - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: jsp page with s:action to call an action with a redirect-action
Hi there,
On Tue, Apr 29, 2008 at 3:46 AM, crappycrumpet <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I have a problem where I have a page (let's call it a.jsp) which calls an
> action using to actionA in namespaceA, using redirect-action, which display the name
> attribute in object a. (both implements modelDriven).
>
> actionB take parameter b.id to find the object b.
> actionA take parameter a.blahId to find object a.
>
> so in my struts.xml I have the following setup.
>
>
> show_name.jsp
>
>
>
>
>
> actionA
> namespaceA
> b.thingyId
>
>
>
>
> Now it works fine when I call it by going to the url
> http://XXX/namespaceB/actionB.action?b.id=123 but when I call it from a jsp
> using like below, it would do the method for actionB but not
> continue to do actionA.
>
> <%@ taglib prefix="s" uri="/struts-tags" %>
>
> 123
>
As you might guess, when the JSP rendering is in progress, the HTTP
headers are already rendered ("on the net"), so they can't be modified
by the server anymore. Thus, an embedded action invoked by cannot send a redirect- or action-redirect-result.
Please tell us exactly what you want to do, as there might be a
simpler solution to your problem.
As your workaround seems to be to "invoke back" actionA from your
example, I guess there's another result for actionA which then renders
the data which results from actionB into the page. This can either be
done using the action chaining (which seems to be discouraged as I've
learned from this maling list) where you don't have to invoke the
action from the JSP but as a result directly, or simply render the
data inside the action tag, doing something like this:
|
|
|
This works because the action tag does not execute the "usual" action
result from the mapping, but rather pushes the action object (and IIRC
the model, if you use ModelDriven) onto the stack, and then evaluates
the action tag body.
Cheers,
-Ralf
>
> Any clue on why it doesn't work and how I can get it to work?
>
> Thanks!
> CC
> --
> View this message in context:
> http://www.nabble.com/jsp-page-with-s%3Aaction-to-call-an-action-with-a-redirect-action-tp16951812p16951812.html
> Sent from the Struts - User mailing list archive at Nabble.com.
>
>
> -
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> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
,
-
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Re: jsp page with s:action to call an action with a redirect-action
Currently I have made a work around by assigning the result for actionB to b.jsp which invoke actionA using another and parsing the parameter through using . I just thought perhaps you can just redirect action without a page in between the two actions. Oh well. cheers. -- View this message in context: http://www.nabble.com/jsp-page-with-s%3Aaction-to-call-an-action-with-a-redirect-action-tp16951812p16952874.html Sent from the Struts - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
jsp page with s:action to call an action with a redirect-action
Hi, I have a problem where I have a page (let's call it a.jsp) which calls an action using show_name.jsp actionA namespaceA b.thingyId Now it works fine when I call it by going to the url http://XXX/namespaceB/actionB.action?b.id=123 but when I call it from a jsp using like below, it would do the method for actionB but not continue to do actionA. <%@ taglib prefix="s" uri="/struts-tags" %> 123 Any clue on why it doesn't work and how I can get it to work? Thanks! CC -- View this message in context: http://www.nabble.com/jsp-page-with-s%3Aaction-to-call-an-action-with-a-redirect-action-tp16951812p16951812.html Sent from the Struts - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
