NAME

Data::MuForm::Manual::Errors - MuForm error methods

VERSION

version 0.05

SYNOPSIS

Manual Index

Errors and error messages for Data::MuForm.

DESCRIPTION

Errors are added to field or form objects by the field 'add_error' method or the form 'add_form_error' method. MuForm will perform the 'add_error' for you for built-in validation or 'apply' actions. When performing your own validation in a validation method, you must do the 'add_error' yourself.

Errors, along with 'input' and 'value' attributes, are collected in the 'error_fields' and 'errors' arrays in fields that contain other fields and in the form.

The existence (or not) of errors determines whether or not the form has been 'validated'.

Form methods

errors, all_errors

Returns an arrayref of localized error strings (both field and form errors):

    my $errors = $form->errors;
    my @errors = $form->all_errors;

has_errors

Both 'form' errors and errors from the tree of subfields

    if( $form->has_errors ) {
        <do something>
    }

form_errors, all_form_errors

Returns an arrayref / array of error strings on the form (not including field errors).

    foreach my $err ( $self->all_form_errors ) {
        $output .= "<span class="error">$err</span>";
    }

has_form_errors

Does the form have form_errors?

add_form_error

Add an error to the form which is not associated with a specific field.

    sub validate {
        my $self = shift;
        unless( <some condition> ) {
            $self->add_form_error('....');
        }
    }

push_form_error

Add a non-localized error to the form.

Field methods

The most common error method is probably 'add_error', which you use in the validation process.

    sub validate_foo {
        my ( $self, $field ) = @_;
        unless ( <some_condition> ) {
            $field->add_error('Error condition');
        }
    }

errors

Returns an array of error strings.

has_errors

Does the field have errors? Note that a compound field that contains subfields with errors will not return true for this method. If you want to know if there are errors in the subfields, do 'has_error_fields'.

num_errors

add_error

Add an error to the field. Localization is performed.

push_error

Add an error without localization.

error_fields

In a compound field (and its subclasses, like 'Repeatable'), the list of fields with errors.

Messages

The base field class and the field subclasses have some 'built-in' error messages. These can be modified by setting the 'messages' hashref in the form or the individual fields, or with the shortcut 'msg.<message name' key in a field definition.

When a message is retrieved in a field with $field->get_message('upload_file_') for example, the 'get_message' method will look first in user-set field specific messages, then in user-supplied form messages, finally in messages provided by the field classes.

   package MyApp::Form;
   use Moo;
   use Data::MuForm::Meta;
   extends 'Data::MuForm';

   sub build_messages {
       return { required => '....', my_message => '....' };
   }
   has_field 'my_field' => ( 'msg.required => 'Please provide a my_field',
       required => 1 );

AUTHOR

Gerda Shank

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Gerda Shank.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.