Mark Hedges > CGI-FormBuilder-Source-YAML-1.0.8 > CGI::FormBuilder::Source::YAML

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NAME ^

CGI::FormBuilder::Source::YAML - Initialize FormBuilder from YAML file

SYNOPSIS ^

 use CGI::FormBuilder;

 my $form = CGI::FormBuilder->new(
    source  => {
        source  => 'form.fb',
        type    => 'YAML',
    },
 );

 my $lname = $form->field('lname');  # like normal

DESCRIPTION ^

This reads a YAML (YAML::Syck) file that contains FormBuilder config options and returns a hash to be fed to CGI::FormBuilder->new().

Instead of the syntax read by CGI::FormBuilder::Source::File, it uses YAML syntax as read by YAML::Syck. That means you fully specify the entire data structure.

LoadCode is enabled, so you can use YAML syntax for defining subroutines. This is convenient if you have a function that generates validation subrefs, for example, I have one that can check profanity using Regexp::Common.

 validate:
    myfield:    
        javascript: /^[\s\S]{2,50}$/
        perl: !!perl/code: >-
            {   My::Funk::fb_perl_validate({ 
                    min         => 2, 
                    max         => 50, 
                    profanity   => 'check' 
                })->(shift);
            }

POST PROCESSING ^

There are two exceptions to "pure YAML syntax" where this module does some post-processing of the result.

REFERENCES (ala CGI::FormBuilder::Source::File)

You can specify references as string values that start with \&, \$, \@, or \% in the same way you can with CGI::FormBuilder::Source::File. If you have a full direct package reference, it will look there, otherwise it will traverse up the caller stack and take the first it finds.

For example, say your code serves multiple sites, and a menu gets different options depending on the server name requested:

 # in My::Funk:
 our $food_options = {
     www.meats.com   => [qw( beef    chicken horta   fish    )],
     www.veggies.com => [qw( carrot  apple   quorn   radish  )],
 };

 # in source file:
 options: \@{ $My::Funk::food_options->{ $ENV{SERVER_NAME} } }

EVAL STRINGS

You can specify an eval statement. You could achieve the same example a different way:

 options: eval { $My::Funk::food_options->{ $ENV{SERVER_NAME} }; }

The cost either way is about the same -- the string is eval'd.

EXAMPLE ^

 method:     GET
 header:     0
 title:      test
 name:       test
 action:     /test
 submit:     test it
 linebreaks: 1

 required:   
    - test1
    - test2

 fields:
    - test1
    - test2
    - test3
    - test4

 fieldopts:
    test1:
        type:       text
        size:       10
        maxlength:  32

    test2:
        type:       text
        size:       10
        maxlength:  32

    test3:
        type:       radio
        options:
            -
                - 1
                - Yes
            -
                - 0
                - No

    test4:
        options:    \@test4opts
        sort:       \&Someother::Package::sortopts

 validate:
    test1:      /^\w{3,10}$/
    test2:
        javascript: EMAIL
        perl:       eq 'test@test.foo'
    test3:
        - 0
        - 1
    test4:  \@test4opts

You get the idea. A bit more whitespace, but it works in a standardized way.

METHODS ^

new()

Normally not used directly; it is called from CGI::FormBuilder. Creates the CGI::FormBuilder::Source::YAML object. Arguments from the 'source' hash passed to CGI::FormBuilder->new() will become defaults, unless specified in the file.

parse($source)

Normally not used directly; it is called from CGI::FormBuilder. Parses the specified source file. No fancy params -- just a single filename is accepted. If the file isn't acceptable to YAML::Syck, I suppose it will die.

SEE ALSO ^

CGI::FormBuilder, CGI::FormBuilder::Source

AUTHOR ^

Copyright (c) 2006 Mark Hedges <hedges@ucsd.edu>. All rights reserved.

LICENSE ^

This module is free software; you may copy it under terms of the Perl license (GNU General Public License or Artistic License.) http://www.opensource.org/licenses/index.html

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