My Revision class extends AbstractMessage and my EditRevision controller extends AbstractMessageController.

When I to upload a file, the new revision is created, but no file is uploaded, when I try to get the number of revision attachments I get an error:

2010-05-27 15:18:15,520 ERROR ExceptionResolver: failed to lazily initialize a collection of role: csns.model.wiki.Revision.attachments, no session or session was closed
2010-05-27 15:18:15,520 ERROR ExceptionResolver: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: csns.model.wiki.Revision.attachments, no session or session was closed

Any help?

JHautzinger wrote:

So I fixed the exception, but the upload is still failing.  Everything runs fine, but when I upload there is no sign of the file anywhere.

I am stuck on the same problem - revision is created and saved, but attachments - not.

As I understand, the file uploading shall be done by processMessage method on AbstractMessageController.

So we call this method from the onSumbit method. For example, like that:

processMessage( revision, user, request );

However, that method will check if request is instance of MultipartHttpServletRequest. And if it is not, then nothing will be done regarding the file uploading.

Apparently, that method cannot cast the request into MultipartHttpServletRequest. And that is where I stuck completely.

Did you guys added enctype="multipart/form-data" in the <form> tag?
 
<form:form  commandName="xyz" enctype="multipart/form-data">
....
</form>

Ref: http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2