NAME Kelp::Module::ValidateTiny - Validate parameters in a Kelp Route Handler VERSION Version 0.01 SYNOPSIS use Kelp::Module::ValidateTiny; # inside your Kelp config file { modules => [ qw{SomeModule Validate::Tiny} ], modules_init => { ... , # :all will import everything # no need to list MyApp here 'Validate::Tiny' => { subs => [ qw{is_required is_required_id} ], into => [ qw{MyApp::OtherRouteClass} ], } } } ... #inside a Kelp route my $vt_rules = { fields => [...], filters => [...], checks => [...], }; my $result = $self->validate($vt_rules) # $result is a Validate::Tiny object # process $result ... # render the template form.tt if validation fails # $errors and valid values are automatically passed, # to the template, but you can optionally pass some # more data to that template my $result = $self->validate($rules, on_error => 'form.tt', data => { message => 'You could try something else' }, ); # If validation fails, $result is an instance of # Validate::Tiny::PlackResponse and has a response # method that can be sent return $result->response unless $result->success # All data is valid here. # use $result->data DESCRIPTION Kelp::Module::ValidateTiny adds Validate::Tiny's validator to your Kelp application. METHODS validate This is the only method decorating $self. You can call it in three ways: First you can pass it just a valid Validate::Tiny $rules hash reference. It will return a Validate::Tiny object and you can call all the usual V::T methods on it. my $result = $self->validate($rules); # $result is now a Validate::Tiny object Second you can pass it a name ('on_error') and value (a template filename) pair. If your data passed the validation, the return value is the usual V::T object. However, if validation fails, the validate method returns an object that has a "response" method in addition to all the Validate::Tiny methods. my $result = $self->validate( $rules, on_error => 'form' ); return $result->response unless $result->success # form.tt rendered ... # Your data was valid here ... # Return some other response Note that calling $result->response if your validations succeeded is a fatal error. The template (form.tt in the code above) is rendered with a hashref that contains the key-value pairs of valid parameters plus a key "error" that points to another hashref with names of invalid parameters as keys and the corresponding error messages as values. So if your parameters were {id => 41, lang => 'Perl', version => '5.10'} and id was found to be invalid with your rules/checks, then the template 'form.tt' renderer is passed the following hashref: { lang => 'Perl', version => '5.10', error { id => 'The answer is 42, not 41', } } This can be useful with a construct like "[% error.name || name %]" in your template. Third, you can pass some additional values that will be passed "as is"" to the on_fail template $self->validate($rules, on_error => 'form.tt', data => { message => 'You could try something else next time!' }, ); Here the caller passes an additional key data so that your "on_error" template renderer gets the following hash ref { lang => 'Perl', version => '5.10', error { id => 'The answer is 42, not 41', }, message => 'You could try something else next time!' } AUTHOR Gurunandan R. Bhat COPYRIGHT Copyright 2013- Gurunandan R. Bhat LICENSE This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO