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https://issues.apache.org/struts/browse/STR-1820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44054#action_44054
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Paul Benedict commented on STR-1820:
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Ralf, can you help me understand this better? Granted, I did read the issue :-)
but still need some help.
> [taglib] <html:form> should not require form bean or should use better warning
> ------------------------------------------------------------------------------
>
> Key: STR-1820
> URL: https://issues.apache.org/struts/browse/STR-1820
> Project: Struts 1
> Issue Type: Improvement
> Components: Taglibs
> Affects Versions: Nightly Build
> Environment: Operating System: other
> Platform: Other
> Reporter: Ralf Hauser
> Assignee: Joe Germuska
> Priority: Minor
> Fix For: 1.4.0
>
>
> For some simple forms, we noticed that having in the jsp just
> <html:form action="/nextAction.do" >
> is sufficient if the submit button values are retrieved via:
> String yesBtn = request.getParameter("submitPropertyName");
> The corresponding form was never declared in the jsp, in fact, it never even
> existed as a Java class.
> Now it turns out that this was only possible because there was another form
> we used globally for language switching (both declared in struts-config.xml
> and
> existing as java class). This language form, however was not named in
> "nextAction"'s <action path=... ,
> only globally.
> Once we removed that other (language-switcher) form, we finally got the
> below stacktrace and error message.
> Conclusion:
> 1) The form bean now identified as being null was filled with another form
> that
> a) wasn't used by this form's action anyway
> b) was only globally declared
> 2) So, if it is possible to access form values without a form existing, I
> guess
> a) Either I should get a warning whenever a form uses an action that
> doesn't have a declaration for this form -- or
> b) let the form not complain at all since doesn't really need the form
> anyway.
> javax.servlet.ServletException: Cannot retrieve definition for form bean null
> at
> org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:533)
> at org.apache.jsp.ourFilejsp._jspService(ourFilejsp.java:86)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
> ...
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