Form::Factory::Feature::Role::Check - features that check control values

version 0.020

  package MyApp::Feature::Bar;
  use Moose;

  with qw(
      Form::Factory::Feature
      Form::Factory::Feature::Role::Check
  );

  sub check {
      my $self = shift;

      # Check the value for errors, it must contain Bar
      my $value = $self->control->{something}->current_value;
      unless ($value =~ /\bBar\b/) {
          $self->result->error('control must contain Bar');
          $self->result->is_valid(0);
      }
      else {
          $self->result->is_valid(1);
      }
  }

  package Form::Factory::Feature::Custom::Bar;
  sub register_implementation { 'MyApp::Feature::Bar' }

Features that check the correctness of control values implement this role. This runs after input has been consumed and cleaned and before it is processed. The check here is meant to verify whether the input is valid and ready for processing. Mark the result as invalid to prevent processing. In general, it's a good idea to return an error if you do that. This is also a good place to return warnings.

The check method is run after the data has been cleaned up and is intended for checking whether or not the data given is ready to be processed. A feature checking the input for valdation should set the is_valid flag on the result. If you do not set is_valid, then you will not influence whether or not the action is considered valid and ready to move on to the processing stage.

This method is passed no arguments other than the object it is being called on. The return value is ignored. If you check method needs to output anything, it should do so through the attached result object.

Andrew Sterling Hanenkamp <hanenkamp@cpan.org>

Copyright 2009 Qubling Software LLC.

This library is free software. You can redistribute it and/or modify it under the same terms as Perl itself.