Provided by: libbread-board-perl_0.37-2_all 
NAME
Bread::Board::Manual::Example::FormSensible - A Form::Sensible and Catalyst example.
VERSION
version 0.37
SYNOPSIS
__PACKAGE__->config(
# ... your other Catalyst configs ...
# first put our universal
# FormBuilder container
# inside the config
FormBuilder => container 'FormBuilder' => [ 'Fields' ] => as {
service 'Form' => (
class => 'Form::Sensible',
block => sub {
my $s = shift;
my $c = $s->parent;
my $fields = $c->get_sub_container('Fields');
my $form = Form::Sensible::Form->new( name => $s->param('name') );
foreach my $name ( $fields->get_service_list ) {
$form->add_field(
$fields->get_service( $name )->get
);
}
if ( my $state = $s->param('state') ) {
$form->set_values( $state );
}
$form;
},
parameters => {
name => { isa => 'Str' },
state => { isa => 'HashRef', optional => 1 },
}
);
},
# Then we can build a set of
# Fields for the 'foo' form
Fields => {
foo => container 'FooFields' => [ 'Model' ] => as {
service 'Username' => (
class => 'Form::Sensible::Field::Text',
block => sub {
Form::Sensible::Field::Text->new(
name => 'username',
validation => { regex => qr/^[0-9a-z]*$/ }
);
}
);
service 'Password' => (
class => 'Form::Sensible::Field::Text',
block => sub {
Form::Sensible::Field::Text->new(
name => 'password',
render_hints => {
'HTML' => {
field_type => 'password'
}
}
);
}
);
service 'Submit' => (
class => 'Form::Sensible::Field::Trigger',
block => sub {
Form::Sensible::Field::Trigger->new(
name => 'submit'
);
}
);
service 'AccessLevel' => (
class => 'Form::Sensible::Field::Select',
block => sub {
my $s = shift;
my $select = Form::Sensible::Field::Select->new(
name => 'access_level',
);
foreach my $access_level ( $s->param('schema')->resultset('AccessLevels')->all ) {
$select->add_option(
$access_level->id,
$access_level->name
);
}
$select;
},
dependencies => {
schema => depends_on('Model/schema') ,
},
);
}
}
);
# later, in a
# catalyst action ...
sub process_foo : Local {
my ($self, $c) = @_;
my $Model = container 'Model' => as { service 'schema' => $c->model('DBIC') };
my $Form = $c->config->{FormBuilder}->create(
Fields => $c->config->{Fields}->{foo}->create(
Model => $Model
)
);
my $f = $Form->resolve(
service => 'Form',
parameters => {
name => 'foo',
state => $c->req->parameters
}
);
my $result = $f->validate;
if ($result->is_valid) {
# ...
}
else {
# ...
}
}
DESCRIPTION
This example came out of a discussion with Jay Kuri about how Bread::Board might be used in conjunction
with his Form::Sensible module.
My idea was to create a generic form builder which is parameterized by a Fields container. This could be
used to store all kind of application wide behaviors. Since this in the context of Catalyst it made sense
to me for this to be stuffed into the Catalyst config hash. I also decided to use service parameters in
the Form service, this allows you to pass in a specific name and to optionally pass in a captured state
to the Form::Sensible::Form instance that is being created.
The next idea was that the Fields container parameter could be created for each specific form in the
application. In the above example all the services are hardcoded, but this could be made more re-usable
using the "include" keyword from Bread::Board itself, or some degree of subclassing of the Container
objects.
Jay also asked about passing in the Catalyst model into the fields so that he could populate something
like a select pull-down menu. Again I used parameterized modules, in this case we parameterized the
FooFields container with a Model container which had a schema service (which was a DBIx::Class schema
object).
From here we move into a Catalyst action to show how this might be used. We start out by wrapping the
Catalyst DBIC model with a simple container, and then proceed to build our $Form object. The $Form is a
Bread::Board container born of 3 levels of parameterized containers, it is worth spending a little time
pondering exactly what is happening there.
So once we have the $Form container, all we need to do is create an instance of our Form::Sensible::Form,
passing in the name and the captured state.
This example could likely be expanded even further to show the use of the Form::Sensible rendering as
well. Further creative use of parameterized containers and a couple utility methods in the Catalyst
controllers could produce fairly robust and easy to use API for an application.
AUTHOR
Stevan Little <stevan@iinteractive.com>
BUGS
Please report any bugs or feature requests on the bugtracker website
https://github.com/stevan/BreadBoard/issues
When submitting a bug or request, please include a test-file or a patch to an existing test-file that
illustrates the bug or desired feature.
COPYRIGHT AND LICENSE
This software is copyright (c) 2019, 2017, 2016, 2015, 2014, 2013, 2011, 2009 by Infinity Interactive.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5
programming language system itself.
perl v5.36.0 2022-12-12 Bread::Board::...e::FormSensible(3pm)