DBIx::Class::HTMLWidget(3pm)

Usage

You'll need a working DBIx::Class setup and some knowledge of HTML::Widget and Catalyst. If you have no idea what I'm talking about, check the (sparse) docs of those modules.

   package My::Model::DBIC::Pet;
   use base 'DBIx::Class';
   __PACKAGE__->load_components(qw/HTMLWidget Core/);
   
   package My::Controller::Pet;    # Catalyst-style
   
   # define the widget in a sub (DRY)
   sub widget_pet {
     my ($self,$c)=@_;
     my $w=$c->widget('pet')->method('get');
     $w->element('Textfield','name')->label('Name');
     $w->element('Textfield','age')->label('Age');
     ...
     return $w;
   }
     
   # this renders an edit form with values filled in from the DB 
   sub edit : Local {
     my ($self,$c,$id)=@_;
  
     # get the object
     my $item=$c->model('DBIC::Pet')->find($id);
     $c->stash->{item}=$item;
  
     # get the widget
     my $w=$self->widget_pet($c);
     $w->action($c->uri_for('do_edit/'.$id));
    
     # fill widget with data from DB
     $item->fill_widget($w);
  }
  
  sub do_edit : Local {
    my ($self,$c,$id)=@_;
    
    # get the object from DB
    my $item=$c->model('DBIC::Pet')->find($id);
    $c->stash->{item}=$item;
    
    # get the widget
    my $w=$self->widget_pet($c);
    $w->action($c->uri_for('do_edit/'.$id));
    
    # process the form parameters
    my $result = $w->process($c->req);
    $c->stash->{'result'}=$result;
    
    # if there are no errors save the form values to the object
    unless ($result->has_errors) {
        $item->populate_from_widget($result);
        $c->res->redirect('/users/pet/'.$id);
    }
  }

Overview

Something like Class::DBI::FromForm / Class::DBI::FromCGI but using HTML::Widget for form creation and validation and DBIx::Class as a ORM.

Methods

fill_widget

   $dbic_object->fill_widget($widget);

Fill the values of a widgets elements with the values of the DBIC object.

populate_from_widget

   my $obj=$schema->resultset('pet)->new->populate_from_widget($result);
   my $item->populate_from_widget($result);

Create or update a DBIx::Class row from a HTML::Widget::Result object

Caevats / possible problems

PostgreSQL

ERROR: null value in column "private" violates not-null constraint

This is a result of we trying to set a value to undef that should not be. This is typically a problem when you have a column such ass "private boolean not null". We have a special-case for this, and if you set data_type => boolean, is_nullable => 0 in your ResultSource definition, we update the value to 0 before attempting to insert or update

Contributors

Simon Elliott, <[email protected]>

Ashley Berlin

Guillermo Sansovic

Releases

9 releases since Debian 5.0 (Lenny); the text changed 4 times.