I'm having a brain fart here. I have a Moose property:

has '_posts' => (is => 'ro', lazy => 1, traits => ['Hash'], isa => 'Ha
+shRef[HashRef]', builder => '_load_posts',                           
+     
                handles => { set_post => 'set', get_post => 'get', num
+_posts => 'count',                                                   
+    
                post_pairs => 'kv', post_keys => 'keys' }, writer => '
+_set_posts');
[download]

As you can see, it has a trait of a hash reference which will store other hash reference values inside of it. I am initializing the property with data from an empty file created like so:

use Storable;
store { {} }, $file;  # This line needs to be changed.
...
$s->_set_posts(retrieve $file);
[download]

But I get an error:

Attribute (_posts) does not pass the type constraint because: Validati
+on failed for 'HashRef[HashRef]' with value 1 at native delegation me
+thod Site::Posts::num_posts (count) of attribute _posts
[download]

How do I create an empty hash reference of hash references properly to satisfy the type restraint for my property? Here is the entire package:

package Site::Posts ;

use Moose;
use Storable;
use Data::Dumper qw(Dumper);
use namespace::autoclean;

has '_posts' => (is => 'ro', lazy => 1, traits => ['Hash'], isa => 'Ha
+shRef[HashRef]', builder => '_load_posts',
                handles => { set_post => 'set', get_post => 'get', num
+_posts => 'count',
                post_pairs => 'kv', post_keys => 'keys' }, writer => '
+_set_posts');
has 'file'   => (is => 'ro', isa => 'Str', required => 1 );



### Public methods ###

sub list {
  my $s = shift;

  if ($s->num_posts) { 
    my @keys = $s->post_keys;
    print Dumper \@keys;
  }
}


sub add {
  my $s = shift;
  my $id = shift;

  $s->set_post($id => {exists => 1});
}

sub delete {
  my $s = shift;
  store { {} }, $s->file;
}

sub save {
  my $s = shift;
  store $s->_posts, $s->file;
}


### Private methods ###
sub _load_posts {                                                     
+                                                                     
+     
  my $s = shift;                                                      
+                                                                     
+     
                                                                      
+                                                                     
+     
  if ( !-f $s->file ) {                                               
+                                                                     
+                                                                     
+                                                       
    store { {} }, $s->file;                                           
+                                                                     
+     
  }                                                                   
+                                                                     
+     
  my $posts = retrieve $s->file;                                      
+                                                                     
+     
  $s->_set_posts($posts);                                             
+                                                                     
+     
}                                                                     
+                                                                     
+     


1;
[download]

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