[Handel] subclassing Handel::Order in Catalyst

[Christopher H. Laco]

Ryan Lauterbach wrote:
> Yaaaa, its working!
> 
> Christopher H. Laco wrote:
>> Ryan Lauterbach wrote:
>>   
>>> Christopher H. Laco wrote:
>>>     
>>>> Ryan Lauterbach wrote:
>>>>  
>>>>       
>>>>> Hi,
>>>>>
>>>>> I have successfully subclassed Handel::Cart and Handel::Cart::Items
>>>>> in .99_14 to add extra fields in cart_items.  Now i need to copy the
>>>>> cart_items fields over to order_items upon checkout.  I believe I
>>>>> need to override copy_cart_items per the Handel::Order POD so here
>>>>> are my classes which don't work.  Thanks for looking:
>>>>>     
>>>>>         
> <bigsnip>
> 
> I'll summarize the steps I took to get custom cart_items and order_items 
> columns working in a catalyst/handel app (if only for my benefit):
> 
> * I used the "Better" approach from 
> http://search.cpan.org/~claco/Handel/lib/Handel/Manual/Cookbook/AddingColumns.pod 
> to create custom cart and cartitem classes:
> 
> package RMA::M::HandelCart;
> use strict;
> use warnings;
> use base qw/Handel::Cart/;
> 
> __PACKAGE__->item_class('RMA::M::HandelItem');
> 
> 
> 1;
> 
> package RMA::M::HandelItem;
> 
> use strict;
> use warnings;
> use base qw/Handel::Cart::Item/;
> 
> __PACKAGE__->storage->add_columns(qw/logo logo_data logo_type photo_type 
> photo_data photo c
> __PACKAGE__->create_accessors;
> 
> 1;
> 
> 
> * I then defined a custom Catalyst::Model::Handel::Order class, 
> specifying custom order_class
> 
> package RMA::M::Order;
> use strict;
> use warnings;
> 
> BEGIN {
>     use base qw/Catalyst::Model::Handel::Order/;
> };
> 
> __PACKAGE__->config(
>     connection_info => ['dbi:mysql:db', 'user', 'pass'],
>     order_class => 'RMA::M::HandelOrder',
> );
> 
> * And in that custom Handel::Order class, point to your custom 
> Handel::Cart class and define the custom order item class, and override 
> copy_cart_items:
> 
> package RMA::M::HandelOrder;
> use strict;
> use warnings;
> use base qw/Handel::Order/;
> 
> __PACKAGE__->cart_class('RMA::M::HandelCart');
> __PACKAGE__->item_class('RMA::M::HandelOrderItem');
> 
> sub copy_cart_items {
>     my ($self, $order, $cart) > 
>     foreach my $item ($cart->items) {
>         $order->add($item);
>     }
> 
>     return;
> }
> 
> * Create the custom Handel::Order::Item class, with same columns as your 
> custom Handel::Cart::Item class
> 
> package RMA::M::HandelOrderItem;
> 
> use strict;
> use warnings;
> use base qw/Handel::Order::Item/;
> 
> __PACKAGE__->storage->add_columns(qw/logo logo_data logo_type photo_type 
> photo_data photo c
> __PACKAGE__->create_accessors;
> 
> 1;
> 
> * Now we need the Checkout controller to use our custom Handel::Order 
> class, so create a custom Handel::Checkout class:
> 
> package RMA::M::CustomCheckout;
> 
> use strict;
> use warnings;
> use base qw/Handel::Checkout/;
> 
> __PACKAGE__->order_class('RMA::M::HandelOrder');
> 
> 1;
> 
> * and then in your Checkout controller instantiate your CustomCheckout 
> class instead of the default Handel::Checkout:
> 
> i.e. replace Handel::Checkout->new    with    RMA::M::CustomCheckout->new
> 
> 
> 
> -----------------------------------------------------------
> 
> 
> Ok, hope I haven't left anything out, or added too many superfluous 
> steps.  Thanks for the help Chris, and the framework!
> 
> 
> -Ryan
> 

Glad it works. One of my goals is to put together a start script that
will auto-gen the step you describe:

$> module-starter --class=Module::Starter::Handel --module=Mycompany

which generates:

MyCompany::Cart
MyCompany::Cart::Item
MyCompany::Storage::Cart
MyCompany::Storage::Cart::Item
MyCompany::Checkout

with all of the subclassing foo already done. Seems like that will help
people get a better start if they intend to customize their usage of
Handel...

-=Chris

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