fetching multiple values

[Migrated From Jforum.net]

Hi,

I have a list of tick boxes and i want to call

this.request.getParameterValues("tickboxName");

so I can get all the values of the users selection however this seems to generate a freemarker error.

Expression session is undefined on line 99, column 173 in default/forum_base.htm.
The problematic instruction:
----------
==> ${session.getUserId()} [on line 99, column 171 in default/forum_base.htm]
 in include "default/forum_base.htm" [on line 7, column 1 in exception.html]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression session is undefined on line 99, column 173 in default/forum_base.htm.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)
	at freemarker.core.Dot._getAsTemplateModel(Dot.java:78)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:86)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Environment.renderElementToString(Environment.java:1342)
	at freemarker.core.StringLiteral.getStringValue(StringLiteral.java:93)
	at freemarker.core.StringLiteral._getAsTemplateModel(StringLiteral.java:80)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.ListLiteral.getModelList(ListLiteral.java:119)
	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:89)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Environment.include(Environment.java:1256)
	at freemarker.core.Include.accept(Include.java:156)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Environment.process(Environment.java:156)
	at freemarker.template.Template.process(Template.java:219)
	at net.jforum.exceptions.ExceptionWriter.handleExceptionData(ExceptionWriter.java:62)
	at net.jforum.JForum.service(JForum.java:345)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
	at java.lang.Thread.run(Thread.java:534)
11:45:04,102 ERROR [ExceptionWriter     ] java.lang.NullPointerException

Has anyone successfully implemented this?

Thanks,

Liam
[originally posted on jforum.net by liam]

[Migrated From Jforum.net]

See this error message:

Expression session is undefined on line 99, column 173 in default/forum_base.htm.

You haven't included an object named "session" in the context.

Rafael

[originally posted on jforum.net by Rafael Steil]