As an unabashed Catalyst n00b, I spent a couple of hours earlier this week bashing through this same design conundrum on my own application, and although I did ultimately come up with the solution that Ash describes under my own steam, the Catalyst::DispatchType::Chained documentation didn't do much to help me with the process at all - nor did the Catalyst tutorial.
I've never contributed, so I don't know the process, but it would be nice to see this information in the documentation. If somebody who knows what's necessary mails me off-list with the information on how to get started, I would be willing hack up Ash's reply into a fairly minimal doc patch in whichever location is appropriate. Cheers, Jeff -----Original Message----- From: Ash Berlin [mailto:[email protected]] Sent: Wednesday, May 19, 2010 3:39 PM To: The elegant MVC web framework Subject: Re: [Catalyst] A point of confusion/frustration on chained actions On 19 May 2010, at 23:16, Stephen Howard wrote: > I am trying to sort out some interdependent chains and I'm having trouble > figuring out why the urls I'm trying to build aren't working out. > > I have a site where the primary objects of interest are flash-based > tutorials. Each tutorial can have comments, and each comment can have > replies. I'm using jQuery to manipulate comments in a REST fashion, and I'm > aiming for a url map like this: > > /tutorials # GET a list of tutorials, or POST a new > tutorial > /tutorials/* # GET/POST/DELETE a specific tutorial > /tutorials/*/comments # GET the comments for a tutorial, or POST > a new comment > /tutorials/*/comments/* # GET/POST/DELETE a specific comment > /tutorials/*/comments/*/replies # GET the replies for a comment, or POST a > new reply > /tutorials/*/comments/*/replies/* # GET/POST/DELETE a specific reply > > But the best I've been able to come up with is this: > > /tutorials > ^tutorials/(\d+)$ > /tutorial/*/comments > /tutorial/*/comment/*/replies > /tutorial/*/comment/*/reply/* > > missing: /tutorial/*/comment (what would I call it? /tutorial/*/cmt ?) > > Essentially I'm hitting an issue with is due to the (seeming?) impossibility > of matching a chained set of actions at multiple url depths. Is it possible > to build the url structure I'm looking for above using chained actions? > > thanks, > Stephen You can get it exactly as you want: (manually re-ordered the below to match your desired list) [debug] Loaded Chained actions: .-------------------------------------+--------------------------------------. | Path Spec | Private | +-------------------------------------+--------------------------------------+ | /tutorials | /tutorials (0) | | | => /all_tutorials | | /tutorials/* | /tutorials (0) | | | -> /a_tutorial (1) | | | => /show_tutorial | | /tutorials/*/comments | /tutorials (0) | | | -> /a_tutorial (1) | | | -> /comments (0) | | | => /show_tutorial_comments | | /tutorials/*/comments/* | /tutorials (0) | | | -> /a_tutorial (1) | | | -> /comments (0) | | | -> /a_comment (1) | | | => /show_comment | | /tutorials/*/comments/*/replies | /tutorials (0) | | | -> /a_tutorial (1) | | | -> /comments (0) | | | -> /a_comment (1) | | | -> /replies (0) | | | => /show_replies | | /tutorials/*/comments/*/replies/* | /tutorials (0) | | | -> /a_tutorial (1) | | | -> /comments (0) | | | -> /a_comment (1) | | | -> /replies (0) | | | -> /a_reply (1) | | | => /show_reply | '-------------------------------------+--------------------------------------' sub tutorials : Chained('/') PathPart CaptureArgs(0) { # stash tutorials rs } sub all_tutorials : Chained('tutorials') PathPart('') Args(0) { # empty, or set stash for view } sub a_tutorial : Chained('tutorials') PathPart('') CaptureArgs(1) { # stash tutorial } sub show_tutorial : Chained('a_tutorial') Args(0) PathPart('') { # setup view } sub comments : Chained('a_tutorial') CaptureArgs(0) PathPart { # stash comments rs from stash->{tutorial} } # You get the idea hopefully.... sub show_tutorial_comments : Chained('comments') Args(0) PathPart('') {} sub a_comment : Chained('comments') CaptureArgs(1) PathPart('') {} sub show_comment : Chained('a_comment') Args(0) PathPart('') { } sub replies : Chained('a_comment') PathPart CaptureArgs(0) {} sub show_replies : Chained('replies') Args(0) PathPart('') {} sub a_reply : Chained('replies') CaptureArgs(1) PathPart('') {} sub show_reply : Chained('a_reply') Args(0) PathPart('') {} -ash _______________________________________________ List: [email protected] Listinfo: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst Searchable archive: http://www.mail-archive.com/[email protected]/ Dev site: http://dev.catalyst.perl.org/ _______________________________________________ List: [email protected] Listinfo: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst Searchable archive: http://www.mail-archive.com/[email protected]/ Dev site: http://dev.catalyst.perl.org/
