This is the very basic outline of Struts events (with some helpful comments) that I worked up when I was using Struts 1.0, although most of it is still the same. Basically I've just expanded steps 3 & 4 of Dan's diagram a bit. Chapter 5 of Chuck's book is much more detailed than this, and an excellent resource (Thanks, Chuck!). In fact I think chapter 5 might be a bit overwhelming for a newbie, and reading the ever-changing Struts source code is not comfortable at first. I've found that this little outline has helped our new Struts developers a lot. Craig suggested a nice UML sequence diagram for the docs, which would be great - but I'm not fluent in UML yet. Here's my document - keep in mind it's been about a year since I wrote this, but I'd be happy to take suggestions on updating it: http://www.posportal.com/StrutsOverview.html Roman Fail Sr. Web Application Developer POS Portal, Inc. -----Original Message----- From: Dan Cancro [mailto:[EMAIL PROTECTED]] Sent: Tue 7/16/2002 5:00 PM To: 'Struts Users Mailing List' Cc: Subject: RE: getting nested tags to work with DynaActionForm??? I'd like to see what you've written. Here's how I understand it so far: http://members.telocity.com/dcancro/images/eng/Struts_MVC.gif > -----Original Message----- > From: Roman Fail [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, July 16, 2002 4:35 PM > To: Rick Reumann; Struts List > Subject: RE: getting nested tags to work with DynaActionForm??? > > > I had the same problem - after reviewing the source code for > DynaActionForm I realized that the underlying ArrayList is > not 'automatically' instantiated by the DynaActionForm. In > other words, when the controller is trying to call > DynaActionForm.set("myField[0]") because it sees a request > parameter called 'myField[0]', there is no ArrayList there > yet to match the "myField" property. My solution was to > subclass DynaActionForm and just override the reset() method > in order to instantiate the ArrayList. (since reset() is > called before any setters). I think I also did this using an > array of BasicDynaBeans, and again had to initialize the > array in reset(). > > Of course you don't have to do this when simply displaying > the data, because you are populating the property with your > ArrayList in Action.perform()/execute() before the > DynaActionForm.get() methods are ever called. > > Is there a better solution out there? I don't like having to > write a subclass just to instantiate the ArrayList. > > This is another example of where knowing the exact sequence > of Struts events is crucial. Has anyone ever written up a > detailed step-by-step of what the controller does when a > request comes in? I've written a brief one for our company's > developers - shall I post it? > > Roman Fail > Sr. Web Application Developer > POS Portal, Inc. > > > -----Original Message----- > From: Rick Reumann [mailto:[EMAIL PROTECTED]] > Sent: Tue 7/16/2002 1:33 PM > To: Struts List > Cc: > Subject: getting nested tags to work with DynaActionForm??? > > > > I had an ArrayList property set in my DynaActionForm > and it worked > fine with the nested tag in displaying the information > from the beans > in the ArrayList of this DynaActionForm. The problem > however came when > I when I hit submit with the updated information. I kept getting > BeanUtils.populate errors with no index value set for > 'field.xxxx[0]'. > Sorry can't cite the exact error since I now went to > using a typical > ActionForm and the nested tag page submits fine. > > Is there something special I need to do in order to get > DynamicActionForms to work with Nested tags? > > Thanks, > > -- > > Rick > mailto:[EMAIL PROTECTED] > > > >
