in reply to Share data bless hash of parent package with childs packages

Hi,

Your code does not compile; that makes it hard to help.

It's also hard to know just what you want to accomplish. If all you want is to not have to use the data hash, just don't use it!

package Father; sub new { my $class = shift; return bless { news => undef }, $class; } 1;
package Daughter; use parent qw(Father); sub status { my $self = shift; $self->{news} = 'bad'; return $self; } sub other { my $self = shift; return $self; } 1;
package Son; use parent qw(Father); sub set { my $self = shift; $self->{news} = 'good'; return $self; } 1;
use lib '.'; use Daughter; use Son; use Data::Dumper; my $daughter = Daughter->new()->status; print Dumper($daughter); my $son = Son->new()->set; print Dumper($son); $daughter->other; print Dumper($daughter);
$ perl 11156317.pl $VAR1 = bless( { 'news' => 'bad' }, 'Daughter' ); $VAR1 = bless( { 'news' => 'good' }, 'Son' ); $VAR1 = bless( { 'news' => 'bad' }, 'Daughter' );

Update: improved example

Hope this helps. But it likely won't because I have likely misunderstood your problem.


The way forward always starts with a minimal test.

Replies are listed 'Best First'.
Re^2: Share data bless hash of parent package with childs packages
by Corion (Patriarch) on Dec 17, 2023 at 16:06 UTC

    Maybe the OP doesn't want to really share data, but wants the Parent class to provide fallback data. But maybe that shouldn't be per-class but more per-instance. Anyway, I would also recommend the OP use a getter/setter approach instead of reaching into the objects:

    sub get( $self, $item ) { if( exists $self->{data}->{ $item }) { return $self->{data}->{ $item } } elsif( $self->{parent_data}->{ $item }) { return $self->{parent_data}->{ $item } } } sub set( $self, $item, $value ) { return $self->{data}->{ $item } = $value; }