Direct call onSubmit in SimpleFormController

**ren78min** · Aug 30th, 2009, 06:09 AM

Hello everyone,
I'm using SimpleFormController to implement a search function. In which the formBackingObject() get search parameters from the request, perform a search, and returns "searchResult" to form display. In the form, there are some submit buttons such as "sort by name", "sort by date", etc. while onSubmit() gets the button's name to process sort function (a search infact) and returns "searchResult" in the same view so that a user can go on sorting in another way.
The full process should like this:

Code:

                   searchResult          searchResult          
formBackingObject ----return----> form  ----submit----> onSubmit
                                    ^                       |
                                    |                       |
                                     <-------return---------- 
                                          searchResult

It runs perfect for the first submition, as the following sequence:
formBakingObject->form->onSubmit->form
but if user continue to submit, the formBackingObject() is called again, in this case, the original search parameters are lost. so, the qustion is how I can "bypass" the formBackingObject(), and submit data form directely to onSubmit() fuction?

ps:
- I've set setSessionForm(true) in formBackingObject()
- I've set method="POST" for the form
- The command calss for SimpleFormController is set to SearchResult

Thanks a lot.

**ren78min** · Aug 30th, 2009, 07:30 AM

I've just tryed an approch with AbstractCommandController, I think it is less complecate.
The question comes to "how to keep data between a sequence of submitions."
A solution is to keep each of them with a <form:hidden> tag, but when the data object becomes complecated this solution seems impossible.
I imagin that there should be a simple way to do this, but I didn't find.
Someone can help? Thanks.

**Marten Deinum** · Aug 31st, 2009, 12:41 AM

Simply set the sessionForm to true. Your object is stored into the session and formBackingObject is called only once... (I suggest the web chapter in the reference guide...).

- I've set setSessionForm(true) in formBackingObject()

You must set it in the constructor or your xml configuration... in the formBackingObject it is set to late.

**ren78min** · Aug 31st, 2009, 04:59 AM

Thank you for your attention.

I tryed to set sessionForm in the xml:

Code:

	<bean id="searchController" class="com.mren.controller.SearchCtrl">
		<property name="sessionForm"><value>true</value></property>
......
		<property name="commandClass" 	value="com.mren.datacargo.SearchResult"/>
		<property name="commandName" value="searchResult"/>
	</bean>

but nothing changes.
I put some code to print the data in jsp, it shows the searchResult exist only in request scope

Code:

......
<body>
session:<c:out value="${sessionScope.searchResult.totalObjectsCount}"></c:out>
request:<c:out value="${searchResult.totalObjectsCount}"></c:out>
<form:form action="/search.htm" commandName="searchResult" method="POST">
......

I tried to put data into session manualy by adding

Code:

WebUtils.setSessionAttribute(request, "searchResult", searchResult);

to onSubmit(), but formBackingObject() is always called.

the actual sequence is:
request -> formBackingObject() -> form -> onSubmit() -> form -> formBackingObject() -> onSubmit() -> form -> formBackingObject() -> onSubmit() -> form ...

while the one expected is :
request -> formBackingObject() -> form -> onSubmit() -> form -> onSubmit() -> form -> onSubmit() -> form ...

**Marten Deinum** · Aug 31st, 2009, 05:10 AM

The bean in sessionscope has a different, generated name so checking if it exists doesn't work that way.

If you set session form to true you should be getting the expected behavior. If you don't there is either a programming or configuration mistake on your side...

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