September 2010 - dancer-users - lists.preshweb.co.uk

Code refactoring gotchas?
by Flavio Poletti 11 Sep '10

11 Sep '10

Hi All, I'm just starting with Dancer, pointers to applicable documentation are more than welcome if you don't have time to give an extended answer. I sometimes am in the need of refactoring code that should be shared between different routes. As an example, I could have a POST route '/do-operation' that has to perform some operations and then generate a page exactly as if a GET route '/default' had been called. I understand that it's not possible (not advisable) to call a route from another route, so the obvious solution that comes to mind is to create a function that encapsulates all that the '/default' route action is supposed to do, then call it from the two different routes: sub default { # ... } get '/default' => \&default; post '/do-operation' => sub { # do whatever I need, then... return default(); } Is this approach save and future-proof? In particular, what are the constraints of using the different Dancer functions - e.g. var, session, splat, ... - inside a sub that isn't "installed" as a route action in the way all the examples report? To give a bit of perspective to my concern, I heard a lot about Devel::Declare and related stuff that plug in during the parsing phase, and I wouldn't like to incur in problems by not adhering to some "best practice", whichever it is (e.g. use HTTP redirections to force the browser to send a new request for '/default', but I would like to avoid this). Thank you, Flavio.

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'set' and 'any' redefined by PDL
by P Kishor 05 Sep '10

05 Sep '10

Hello, I have a problem... I am incorporating PDL (http://pdl.perl.org) into my Dancer web site, and I am getting the error message that 'set' and 'any' are redefined. 'set' and 'any' are important PDL methods. Is there any way I can redefine Dancer's 'set' and 'any' to something like 'dancer-set' and 'dancer-any' and have everyone live in harmony? -- Puneet Kishor http://www.punkish.org Carbon Model http://carbonmodel.org Charter Member, Open Source Geospatial Foundation http://www.osgeo.org Science Commons Fellow, http://sciencecommons.org/about/whoweare/kishor Nelson Institute, UW-Madison http://www.nelson.wisc.edu ----------------------------------------------------------------------- Assertions are politics; backing up assertions with evidence is science =======================================================================

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Re: [Dancer-users] Short basic tutorial on perldancer for Beginners
by Goke Aruna 05 Sep '10

05 Sep '10

Thank Kish for your time, I can do my web in PHP and HTML but just looking for basic web programming and if possible, join existing project to learn better not to learn basic stuff here. Perl GUI or webui is not as common as python, Ruby and PHP are. Anyway, appreciate your response. On Sep 5, 2010 4:39 PM, "P Kishor" <punk.kish(a)gmail.com> wrote: > On Sun, Sep 5, 2010 at 10:15 AM, Goke Aruna <p6klass(a)gmail.com> wrote: > > Hello kishor, > > I have read... > Hmmm.. I am not sure how to interpret the above statement. Dancer > users list is hardly the place for seeking guidance in "basic web > design." Dancer is not a web design tool. It is a web programming > framework. > > Search on your favorite search engine for "basic web design" and go > with the best of the choices returned. > > > > > I have enjoyed my perl scripting but need to fill up the gap of near > > non-existing small CRM su... > I don't know how to interpret the above statement as well. what does > > "need to fill up the gap of near non-existing small CRM suite from > perl" mean? > > > > I will be glad for mentoring > > Thanks > > > > On Sep 5, 2010 4:07 PM, "P Kishor" <punk.kish(a)gmail.com... > -- > Puneet Kishor >

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Re: [Dancer-users] Short basic tutorial on perldancer for Beginners
by Goke Aruna 05 Sep '10

05 Sep '10

Hello kishor, I have read cookbook and just need a guide in doing basic web design before moving to development. I have enjoyed my perl scripting but need to fill up the gap of near non-existing small CRM suite from perl. I will be glad for mentoring Thanks On Sep 5, 2010 4:07 PM, "P Kishor" <punk.kish(a)gmail.com> wrote: > On Sun, Sep 5, 2010 at 8:29 AM, Goke Aruna <p6klass(a)gmail.com> wrote: > > > Hello list, > > Can someone just give me the basic concept used in using dancer? > > I have been looki... > did you see Dancer::Cookbook, Dancer::Introduction and perldancer.org? >

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Short basic tutorial on perldancer for Beginners
by Goke Aruna 05 Sep '10

05 Sep '10

Hello list, Can someone just give me the basic concept used in using dancer? I have been looking for opportunities to program web and I have explored several option in Ruby and python but just can forget doing it in perl. I have read catalyst irc chat but seems complex to get going for me. I will be glad for short and easy tutorial to get me going in perl dancer. Thanks

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1.1809 broke my 1.808 load_app
by P Kishor 03 Sep '10

03 Sep '10

I had the following in 1.1808 and it worked package foo; use Dancer ':syntax'; load_app "foo::bar" , prefix => "/bar"; load_app "foo::baz", prefix => "/baz"; and my filesystem is app/ lib/ foo.pm foo/ bar.pm bar/ barstuff.pm baz.pm baz/ bazstuff.pm I just upgraded Dancer to 1.1809, and now I get a four oh four on /bar and /baz What gives? -- Puneet Kishor

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runtime error
by Maurice Mengel 02 Sep '10

02 Sep '10

Hi! I get a "runtime error" with the message: "Warning caught during route execution: objId544" I don't understand what that means nor where it comes from. It seems to happen after every thing is done. At least I still get the debug message from the last line before the last return in the route. "objId544" refers to REQUEST_URI which is "/oai?verb=GetRecord&identifier=spk.berlin.de:EM-objId-544&metadataPrefix=lido" in this example. The stack (see below) doesn't point anywhere useful. At least for not useful for me. l. 142 is "dance;" Any tips for me? Thanks! Maurice main in ./Salsa_OAI.pl l. 4 Dancer in /usr/lib/perl5/site_perl/5.10/Dancer.pm l. 190 main in lib/Salsa_OAI.pm l. 0 main in lib/Salsa_OAI.pm l. 0 Dancer in (eval 55) l. 2 Salsa_OAI in lib/Salsa_OAI.pm l. 142 Dancer in /usr/lib/perl5/site_perl/5.10/Dancer.pm l. 105 Dancer in /usr/lib/perl5/site_perl/5.10/Dancer.pm l. 228 Dancer::Handler::Standalone in /usr/lib/perl5/site_perl/5.10/Dancer/Handler/Standalone.pm l. 58 Dancer::Handler::Standalone in /usr/lib/perl5/site_perl/5.10/Dancer/Handler/Standalone.pm l. 54 HTTP::Server::Simple in /usr/lib/perl5/site_perl/5.10/HTTP/Server/Simple.pm l. 271 HTTP::Server::Simple in /usr/lib/perl5/site_perl/5.10/HTTP/Server/Simple.pm l. 307 HTTP::Server::Simple in /usr/lib/perl5/site_perl/5.10/HTTP/Server/Simple.pm l. 402 HTTP::Server::Simple::PSGI in /usr/lib/perl5/site_perl/5.10/HTTP/Server/Simple/PSGI.pm l. 103 HTTP::Server::Simple::PSGI in /usr/lib/perl5/site_perl/5.10/HTTP/Server/Simple/PSGI.pm l. 103 Dancer::Handler::Standalone in /usr/lib/perl5/site_perl/5.10/Dancer/Handler/Standalone.pm l. 39 Dancer::Handler in /usr/lib/perl5/site_perl/5.10/Dancer/Handler.pm l. 64 Dancer::Handler in /usr/lib/perl5/site_perl/5.10/Dancer/Handler.pm l. 65 Dancer::Renderer in /usr/lib/perl5/site_perl/5.10/Dancer/Renderer.pm l. 24 Dancer::Renderer in /usr/lib/perl5/site_perl/5.10/Dancer/Renderer.pm l. 125 Dancer::Route in /usr/lib/perl5/site_perl/5.10/Dancer/Route.pm l. 144 Dancer::Route in /usr/lib/perl5/site_perl/5.10/Dancer/Route.pm l. 195 Dancer::Error in /usr/lib/perl5/site_perl/5.10/Dancer/Error.pm l. 23 Dancer::Error in /usr/lib/perl5/site_perl/5.10/Dancer/Error.pm l. 208

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