On 18 Jul 2010, at 21:42, Alejandro Imass wrote:
Ok. already! ;-) I have a big bump in my forehead from all this
headbanging. With the headache and all I think I finally
understand...I hope... In my case I need a model that creates an
object to handle every request individually so:
Yep, you got it.
Couple of slight clarifications / corrections below.
1) Create a very thin layer that will be the instance. Having: BEGIN
{extends 'Catalyst::Model'; }
2) Override ACCEPT_CONTEXT
ACCEPT_CONTEXT is optional (so you're not overriding it).
3) In this sub, create an object of type foo and return _that_
instead of $self
So my Model instance is in fact a factory.
Just so.
This way I don't have to
worry about the attributes because each controller will have it's own
copy of foo. Is this close?
Yes. In fact, if you just write an ACCEPT_CONTEXT method, then every
call to $c->model('Foo') will factory a new instance for you. Which
may or may not imply each controller (or event different parts of the
same controller) gets a different one, depending on how you structure
your controller code.
The Definitive Guide to Catalyst has an extension to the Catalyst
Cookbook, in page 255 talks about Catalyst::Model::Factory which might
be another way of doing what I want, but perhaps overkill for my
simple problem.
No, Catalyst::Model::Factory does _exactly_ and _only_ this for you,
so you probably/possibly want to use that rather than writing it
yourself :)
Another possibility it's well worth looking into if appropriate is
Catalyst::Component::InstancePerContext, which handles all of the
logic to put the instance which is generated by the factory into the
stash for you, so that subsequent requests to $c->model('Foo') in the
same request get back the same instance...
In some cases (if you're changing the state of this model during a
request) then that's likely what you're looking for.
Cheers
t0m
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