[Dbix-class] compoase_namespace, add_column, and result_source_instance

[Christopher H. Laco]

Just to expand the example, resetting class->result_source_instance to
use the source from the new schema instead of the original schema
appears to fix the problem:


> use Handel::Cart::Schema;
> 
> my $schema = Handel::Cart::Schema->connect($ENV{HandelDBIDSN});
> my $new = $schema->compose_namespace('Foo');
> 
> print $schema->class('Items'), "\n";
> print $new->class('Items'), "\n";
> 
> print $schema->class('Items')->result_source_instance, "\n";
> print $new->class('Items')->result_source_instance, "\n";
> 
> print $schema->source('Items'), "\n";
> print $new->source('Items'), "\n";
> 
> 
> # this ishacky, but it appears to work...
> $new->class('Items')->result_source_instance($new->source('Items'));
> $new->source('Items')->add_column('custom' => {accessor => 'foo'});
> $new->class('Items')->register_column('custom' => {accessor => 'foo'});
> 
> print $new->class('Items')->columns, "\n";
> print $schema->class('Items')->columns, "\n";
> print $new->class('Items')->columns, "\n";
> print $schema->class('Items')->columns, "\n";
> 
> $new->resultset('Items')->delete_all;
> $new->resultset('Items')->create({id=>1, custom=>'foo'});
> print $new->resultset('Items')->find(1)->bar;

At this point, everything prints the right amount of columns, and the
accessor is created in the correct source class.

One more item of interest...if I try this instead:

> # this ishacky, but it appears to work...
> $new->class('Items')->result_source_instance($new->source('Items'));
> $new->source('Items')->add_column('custom' => {accessor => 'foo'});
> $new->class('Items')->register_column('custom' => $new->source('Items')->column_info('custom'));

I get this:

> Attempt to free unreferenced scalar: SV 0x250793c at F:\CatInABox\extlib/SQL/Abstract/Limit.pm line 325.
> Attempt to free unreferenced scalar: SV 0x25124bc at F:\CatInABox\extlib/SQL/Abstract/Limit.pm line 325.

So, at this point, I think I can work around the nuances. I'm just not
sure if anything in there related to result_source_instance after
compose_namespace is a bug or a feature.

-=Chris

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