HTML::Template::AssociaUtsee(r3)Contributed Perl DocumenHtTaMtLi:o:nTemplate::Associate(3)



NNAAMMEE
               HTML::Template::Associate - Associate relevant packages with HTML::Template

SSYYNNOOPPSSIISS
               #Example usage with FormValidator as the target

               use CGI qw/:standard/;
               use Data::FormValidator;
               use HTML::Template;
               use HTML::Template::Associate;

               my $cgi = CGI->new;
               #for testing purposes we can add some input to our cgi object
               $cgi->param( 'fullname', 'John Doe' );
               $cgi->param( 'phone', 6041112222 );
               $cgi->param( 'email', 'invalid@email' );

               my $input_profile = {
                       optional => [ qw( company fax country ) ],
                       required => [ qw( fullname phone email address city state zipcode ) ],
                       constraints  => {
                               email => 'email',
                               fax => 'american_phone',
                               phone => 'american_phone',
                               zipcode => '/^\s*\d{5}(?:[-]\d{4})?\s*$/',
                               state => "state",
                       },
                       defaults => { country => "Canada" },
                       msgs => {
                               prefix=> 'error_',
                               missing => 'Not Here!',
                               invalid => 'Problematic!',
                               invalid_seperator => ' <br /> ',
                               format => 'ERROR: %s',
                               any_errors => 'some_errors',
                       }
               };

               my $validator = Data::FormValidator->new;
               my $results = $validator->check ( scalar $cgi->Vars, $input_profile );

               my $associate = HTML::Template::Associate->new( {
                       target => 'FormValidator',
                       results => $results,
                       extra_arguments => [ $validator ] #not needed but just illustrated
               } );

               my $template = HTML::Template->new(
                       filename => 'test.tmpl',
                       associate => [ $cgi, $associate ]
               );

               print $template->output;

               #and in our test.tmpl file we could have

               Valid Fields:<br>
               <TMPL_LOOP NAME=VALID_FIELDS>
               Field Name: <TMPL_VAR NAME=FIELD_NAME><br>
               Field Value: <TMPL_VAR NAME=FIELD_VALUE><br>
               </TMPL_LOOP>

               Missing Fields:<br>
               <TMPL_LOOP NAME=MISSING_FIELDS>
               Field Name: <TMPL_VAR NAME=FIELD_NAME><br>
               Field Value: <TMPL_VAR NAME=FIELD_VALUE><br>
               </TMPL_LOOP>

               <TMPL_IF NAME=INVALID_phone>
               Phone: <TMPL_VAR NAME="phone"> you supplied is invalid.
               </TMPL_IF>

               <TMPL_IF NAME=MISSING_city>
               City name is missing, please fix this.
               </TMPL_IF>

               <!-- We can also access our normal field names
               since $cgi object was passed as associate as well -->

               I think <TMPL_VAR NAME=country> is very big country.

               <!-- Optional use of Data::FormValidator::Results msgs interface -->

               Message Fields:

               <TMPL_LOOP NAME=MSGS_FIELDS>
               Field Name: <TMPL_VAR NAME=FIELD_NAME><br>
               Field Value: <TMPL_VAR NAME=FIELD_VALUE><br>
               </TMPL_LOOP>

               <TMPL_IF NAME=MSGS_error_city>
               Our default error message set in the profiling code is:
                       <TMPL_VAR NAME=MSGS_error_city>
               </TMPL_IF>

               #Example usage with DBI as the target
               use DBI;
               use HTML::Template;
               use HTML::Template::Associate;

               #initiliaze your $dbh ...

               my $results_foo = $dbh->selectall_hashref (
                       'SELECT foo FROM bar WHERE baz = ?',
                       'foo_id',
                       {},
                       $baz
               );

               my $results_bar = $dbh->selectall_hashref (
                       'SELECT foo, bar FROM bar WHERE baz = ?',
                       [ 'foo_id', 'bar_id' ] ,
                       {},
                       $baz
               );

               my $results_moo = $dbh->selectrow_hashref ( 'SELECT x, y FROM z LIMIT 1' );

               my @results_array = $dbh->selectrow_array ( 'SELECT x FROM z' );

               my $associate = HTML::Template::Associate->new( {
                       target => 'DBI',
                       create => [ {
                                       results => $results_foo,
                                       name => 'my_loop',
                                       type => 'selectall_hashref'
                               }, {
                                       results => $results_bar,
                                       name => 'my_other_loop',
                                       type => 'selectall_hashref'
                               }, {
                                       results => $results_moo,
                                       type => 'selectrow_hashref',
                                       name => 'my_params'
                               }, {
                                       results => \@results_array,
                                       type => 'selectrow_array',
                                       name => 'my_array_params'
                               }
                       ]
               } );

               my $template = HTML::Template->new (
                       filename => 'test.tmpl',
                       associate => [ $associate ],
                       die_on_bad_params => 0
               );

               print $template->output();

               #sample.tmpl

               <!-- TMPL_LOOP NAME="my_loop" -->
                       Foo is:<!-- TMPL_VAR NAME="foo" -->
               <!-- /TMPL_LOOP -->

               <!-- TMPL_LOOP NAME="my_other_loop" -->
                       Foo is:<!-- TMPL_VAR NAME="foo" -->
                       Bar is:<!-- TMPL_VAR NAME="bar" -->
               <!-- /TMPL_LOOP -->

               x is:<!-- TMPL_VAR NAME="my_params.x" -->
               y is:<!-- TMPL_VAR NAME="my_params.y" -->

               x via $dbh->selectrow_array is:<!-- TMPL_VAR NAME="my_array_params.0 -->

DDEESSCCRRIIPPTTIIOONN
               HTML::Template::Associate bridges gap between HTML::Template and
               other modules that can be used in conjunction with it to do something
               useful together, like for example Data::FormValidator that can verify
               form inputs.

               The idea is that every associate object can map required data structure
               onto the one which corresponds to the one found in HTML::Template.
               The factory will then instantiate the target class and user can then make
               it available to HTML::Template via associate argument during object
               construction. The data structures then become automatically visible to
               your templates.

               This module is abstract class it provides no mapping functionality
               whatsoever, but rather defines common interface to all associate
               objects underneath it and acts as a object production factory.
               You should however use this module whenever you wish to access a
               concrete associate class that provides functionality you desire.

UUSSAAGGEE
               #where $results = Data::FormValidator::Results; for example
               my $associate = HTML::Template::Associate->new( {
                       target => 'FormValidator',
                       results => $results
               } );

               Target is always last portion of your full class name, so if
               you had HTML::Template::Associate::XYZ the target would be XYZ

BBUUGGSS
               Maybe. If you see any make sure you let me know.

SSUUPPPPOORRTT
AAUUTTHHOORR
               Alex Pavlovic
               alex.pavlovic@taskforce-1.com
               http://www.taskforce-1.com

CCOOPPYYRRIIGGHHTT
               This program is free software; you can redistribute
               it and/or modify it under the same terms as Perl itself.

               The full text of the license can be found in the
               LICENSE file included with this module.

SSEEEE AALLSSOO
               HTML::Template::Associate::FormValidator HTML::Template::Associate::DBI perl(1).

       nneeww

               Usage     : my $associate = HTML::Template::Associate->new ( $target_arguments );
               Purpose   : Constructs new Associate object
               Returns   : Associate instance
               Argument  : Refer to the target
               Throws    : Error in case target does not exist
               Comments  : None

       ppaarraamm

               Usage     : my $MyParam = $associate->param('MyParam');
               Purpose   : Retrieves param in a form suitable for access by HTML::Template
               Returns   : Single param or arrays suitable for loops
               Argument  : Parameter name and optional value if setting it
               Throws    : Error in case subroutine was not implemented in concrete class
               Comments  : This subroutine should be redefined in concrete class

       iinniitt

               Usage     : $self->init ( $params );
               Purpose   : Provides basic initiliazation for the target class
               Returns   : true or false depending on whether initilization was succesful
               Argument  : hash of parameters passed to factory during object construction
               Throws    : Error in case subroutine was not implemented in concrete class
               Comments  : This subroutine should be redefined in concrete class

       lloogg

               Purpose   : Used internally to warn errors

       eerrrroorr

               Purpose   : Used internally to die on errors



perl v5.8.7                       2006-01-24      HTML::Template::Associate(3)
