edit topic errors occurs

[Migrated From Jforum.net]

i use the firefox browser.
1.i add a new topic with an attachment is success. (an attachment and its Description is given)
and then i edit this topic,everything is ok.


2.
i added an another topic with an attachment but its description haven't given.
added it OK.
but,errors occurs when i edit it.like this below:

An error has occurred.

For detailed error information, please see the HTML source code, and contact the forum Administrator.

Expression a.info.comment is undefined on line 58, column 60 in default/js/attachments.js.

and the HTML source code is below:

<!-- BEGIN ERROR STACK TRACE

Expression a.info.comment is undefined on line 58, column 60 in default/js/attachments.js.
The problematic instruction:
----------
== ${a.info.comment} [on line 58, column 58 in default/js/attachments.js]
 in include "js/attachments.js" [on line 20, column 1 in default/post_form.htm]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression a.info.comment is undefined on line 58, column 60 in default/js/attachments.js.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.Expression.getStringValue(Expression.java:118)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:160)
	at freemarker.core.Environment.visit(Environment.java:351)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.process(Environment.java:176)
	at freemarker.template.Template.process(Template.java:232)
	at net.jforum.JForum.processCommand(JForum.java:233)
	at net.jforum.JForum.service(JForum.java:200)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:623)
	at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)
	at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)
	at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)
	at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221)
	at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:122)
	at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:111)
	at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
	at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
	at java.lang.Thread.run(Thread.java:595)

URL is: /club/jforum.page?module=posts&action=edit&post_id=8&start=0
END ERROR STACK TRACE-->

[originally posted on jforum.net by bacon88]

[Migrated From Jforum.net]

A quick fix to allow for attachments without description would be to modify your attachments.js file at around line 58 to look like:

attach_${a.id}["filename"] = "${a.info.realFilename}";
<#if a.info.comment?exists >
  attach_${a.id}["description"] = "${a.info.comment}";
<#else>
  attach_${a.id}["description"] = "No description.";
</#if>
attach_${a.id}["id"] = "${a.id}";

Alternatively, you could add some Javascript to the attachment form to force a description to be entered.
[originally posted on jforum.net by monroe]