Hi Monks,

I am trying to serialise and reload a Moose object structure. I would like to build my object structure, dump this out to a JSON, then load a JSON that may have some of the values modified and have these changes propagated through my object structure.

I tried do this with MooseX::Storage, however when I load the modified JSON the changed value is not reflected in the Moose object

In the example below it looks like the incoming json is being ignored. Have I missed something or misunderstood how load works?

#!/usr/bin/perl -w

#------------------------------------------------
package myDevice;
use strict;
use Moose;
use MooseX::Storage;
with Storage( 'format' => 'JSON', 'io' => 'File' );
#with Storage( 'format' => [ JSONpm => { json_opts => { pretty => 1 } 
+} ], 'io' => 'File' );
has 'instruments' => ( isa => 'HashRef', is => 'rw', default => sub { 
+{} } );

sub BUILD {
  my $self = shift;
  
  my $noOfInstruments = keys(%{$self->instruments}) . "\n";
  if ( $noOfInstruments > 0 ) {
    print "The object seems to exist already\n";
  } else {
    $self->instruments->{batt1} = readBatteryVoltage->new();
    $self->instruments->{batt2} = readBatteryVoltage->new();
    $self->instruments->{batt3} = readBatteryVoltage->new();
  }
  return $self;
}

1;

#------------------------------------------------
package readBatteryVoltage;
use strict;
use Moose;
use MooseX::Storage;
with Storage( 'format' => 'JSON', 'io' => 'File' );
#with Storage( 'format' => [ JSONpm => { json_opts => { pretty => 1 } 
+} ], 'io' => 'File' );
has 'randomNumber' => (
  is        => 'rw',
  default   => 1234567,
);
has 'var2' => (
  is        => 'rw',
  default   => 1999,
);
has 'str1' => (
  is        => 'rw',
  default   => "I am a string",
);
1;

#------------------------------------------------
my $aNewDevice = myDevice->new();      # create our device
print "+++++++++++++++Initial object we create\n";
print $aNewDevice->freeze() . "\n";    # look at the output

# Its should look as below
#{"__CLASS__":"myDevice","instruments":{"batt":{"__CLASS__":"readBatte
+ryVoltage","randomNumber":1234567}}}

$aNewDevice->store('file1.json');      # save our object

# Lets quickly modify the value
system 'perl -p -i -e \'s/1234567/987654321/\' file1.json';
system 'perl -p -i -e \'s/1234567/10293847/\' file1.json';
# remove a value to have a partial JSON
system 'perl -p -i -e \'s/,\"var2\":1999//g\' file1.json';
# Change this also
system 'perl -p -i -e \'s/am a string/am a number/\' file1.json';
system 'perl -p -i -e \'s/am a string/am a modified variable/\' file1.
+json';
print "+++++++++++++++++File after modification\n";
system 'more file1.json';

# Its should look as below
#{"__CLASS__":"myDevice","instruments":{"batt":{"__CLASS__":"readBatte
+ryVoltage","randomNumber":987654321}}}

my $anotherNewDevice = myDevice->load('file1.json');

use Data::Dumper;
print "+++++++++++++++++Using Dumper\n";
print Dumper($anotherNewDevice);

print "+++++++++++++++++Our new device\n";
print $anotherNewDevice->freeze() . "\n";

# Why is randomNumber not taking the vaue 987654321?
#{"__CLASS__":"myDevice","instruments":{"batt":{"__CLASS__":"readBatte
+ryVoltage","randomNumber":1234567}}}
[download]

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