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Struts: Question about Form Validation Using XML example

+2 votes
114 views

I can't see what's going on behind the scenes in this example so I'm asking for help in order to understand the Strtus process.

I run the example, leave empty "First Name" to make validation fail, and submit. Then go back to index:

http://localhost:8084/form_xml_validation

and click on edit. But "First name" is reset with the original value. It should be empty because Person instance is managed statically. In fact, other examples (preparable, exclude params) behave as expected, and return an empty String for the filed left empty.

The thing here is than I'm not understanding how Struts works here. I would appreciate if you help me with this.

Example is here:
http://struts.apache.org/release/2.3.x/docs/form-validation-using-xml.html

Code for checkout here:
http://svn.apache.org/repos/asf/struts/sandbox/trunk/struts2examples/

Examples doing as expected:
http://struts.apache.org/release/2.3.x/docs/exclude-parameters.html
http://struts.apache.org/release/2.3.x/docs/preparable-interface.html

posted Oct 2, 2013 by Sonu Jindal

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1 Answer

+1 vote

Maybe your browser is filling the field and it has nothing to do with Struts validation? Check that in anonymous mode.

answer Oct 3, 2013 by Bob Wise
Same behavior in private mode.
I believe it has to do with Prepare (preparable and exclude-paras use  Preparable) and interceptors stack, but I'm not sure. Still a mystery  for me, because the code is almost identical.
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In the context of an tag, for instance for a login action, we previously always coded forms as :

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And in the struts.xml we have been using :

content.login
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This has worked in the past and allowed us to not only use the action="login" to target the execute method of the action, but also to build links to, for instance, login_checkStatus.action to target other, specific methods within the action. I am not sure this Is a common/best practice, I had no prior struts2 experience before joining this company and this is how a lot of the existing functionality is coded. (If this is wrong/there is a better way, please let me know)

Now randomly, this fails to generate the proper action url in the html (it is missing the '.action', which results in a 404 once you post the form)

The only workaround we have found so far is to add the '.action' suffix to the
s:form's action attribute. Before it was always added for us by struts.

So now we are having success with

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I can only assume that this has been affected by the changes related to S2-015 and the wildcard action matching.

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