On 2/21/07, Adrian Howard <[EMAIL PROTECTED]> wrote:
> Rose::DB::Object::Loader->new(
> db => MyApp::DB->new,
> class_prefix => 'MyApp'
> )->make_classes(
> pre_init_hook => sub {
> my $meta = shift;
> $meta->column( 'some_column' )->alias( '_some_column' )
> if $meta->table eq 'some_table';
> }
> );
>
> then off in MyApp::SomeTable I do:
>
> sub some_column {
> my $self = shift;
> # ...stuff I need to do before changing value goes here...
> return $self->_some_column( @_ );
> }
>
> Reasonable? Is there a better way (for some definition of "better")?
That's reasonable. I've done similar things in generated and manually
created classes.
> As I understand it triggers happen after the object is updated in memory. I
> want to shim stuff in before this (so I can preserve the original value if I
> don't want the update to proceed)
You're right that the on_set trigger happens after the column value
has been set. I could probably stand to add a few more trigger events
(e.g., before_set) but I'm wary of trigger-itis gumming up the works.
So I've just been waiting to see what kinds of events people actually
need. It seems like you're registering one vote for before_set :)
But in the meantime, the technique you're using instead is fine.
-John
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