[Dbix-class] accessing ResultSet function from a related object

[Matt S Trout]

On Wed, Jul 04, 2007 at 05:47:05PM -0400, John Goulah wrote:
> I am having some trouble in both controller and template code accessing
> resultset functions off of chained/related objects (because from what I'm
> seeing they are not ResultSets but of the type
> MyApp::Model::MyAppDB::Tablename).

That's isa MyAppDB::Tablename, not MyAppDB::TablenameResultset or whatever.
 
> For example I can create a ResultSet object directly like:
>    my $owner = $c->model('MyDB::User')->search({ user_id => $owner_id } );
> 
> and then I can do for example:
> 
>    $owner->some_result_set_method()

If it's an RS, call the variable $owners or $owner_rs. Trust me that this will
make your life easier.

> but I can't do this if I want to chain off another object, such as:
> 
>    #not ok
>    my $owner_id =
> $photo_details_rs->first()->owner->some_result_set_method();
> 
> but...
> 
>    #this is fine, just accessing a field
>    my $owner_id = $photo_details_rs->first()->owner->user_id;

The relationship must be returning an object, not a resultset then.

Don't confuse the Result (single object) and ResultSet (effectively a
virtual collection) objects. There's no reason you can't implement methods
on both but they are -not- the same thing.

This is why I religiously keep $owner versus $owner_rs coding conventions;
it makes it way easier to avoid getting confused :) 

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