NAME

Nano - Object Persistence

ABSTRACT

Minimalist Object Persistence

SYNOPSIS

package Person;

use Moo;

extends 'Nano::Node';

has name => (
  is => 'ro',
  required => 1,
);

has friends => (
  is => 'ro',
  default => sub { People->new }
);

sub extroverted {
  my ($self) = @_;
  ($self->friends->count > 1) ? 1 : 0
}

sub introverted {
  my ($self) = @_;
  ($self->friends->count < 2) ? 1 : 0
}

package People;

use Moo;

extends 'Nano::Nodes';

sub new_type {
  'Person'
}

sub extroverted {
  my ($self) = @_;

  $self->scope(sub {
    my ($person) = @_;
    $person->extroverted
  });
}

sub introverted {
  my ($self) = @_;

  $self->scope(sub {
    my ($person) = @_;
    $person->introverted
  });
}

package main;

my $rachel = Person->new(
  id => 'rachel',
  name => 'rachel',
);
my $monica = Person->new(
  id => 'monica',
  name => 'monica',
);
my $phoebe = Person->new(
  id => 'phoebe',
  name => 'phoebe',
);

$rachel->friends->set($monica);
$rachel->friends->set($phoebe);

$monica->friends->set($rachel);
$monica->friends->set($phoebe);

$phoebe->friends->set($rachel);
$phoebe->friends->set($monica);

$rachel->save;
$monica->save;
$phoebe->save;

$phoebe->friends->count; # 2
$phoebe->friends->extroverted->count; # 2
$phoebe->friends->introverted->count; # 0

my $nano = Nano->new;

my $friend = $nano->find('rachel');

DESCRIPTION

This package provides a minimalist framework for persisting objects (i.e. class instances) with as little effort as possible. This framework relies on the Zing toolkit which provides pluggable storage and serialization options.

LIBRARIES

This package uses type constraints from:

Nano::Types

ATTRIBUTES

This package has the following attributes:

env

env(Env)

This attribute is read-only, accepts (Env) values, and is optional.

METHODS

This package implements the following methods:

domain

domain(Str $name) : Domain

The domain method returns a Zing::Domain object for the ID provided.

domain example #1

my $nano = Nano->new;

my $domain = $nano->domain('rachel');

dump

dump(Object $object) : HashRef

The dump method returns a serialized hash representation for the object provided.

dump example #1

my $nano = Nano->new;

my $rachel = $nano->find('rachel');

my $dump = $nano->dump($rachel);

find

find(Str $name) : Node

The find method finds, inflates, and returns a prior persisted object for the ID provided.

find example #1

my $nano = Nano->new;

my $phoebe = $nano->find('phoebe');

lookup

lookup(Str $name) : Lookup

The lookup method returns a Zing::Lookup object for the ID provided.

lookup example #1

my $nano = Nano->new;

my $rachel = $nano->find('rachel');

my $lookup = $nano->lookup($rachel->friends->id);

name

name(Object $object) : Str

The name method returns the class name for the object provided.

name example #1

my $nano = Nano->new;

my $rachel = $nano->find('rachel');

my $name = $nano->name($rachel);

object

object(HashRef $object) : Object

The object method returns an object derived from a prior serialization representation.

object example #1

my $nano = Nano->new;

my $new_rachel = $nano->object({
  '$type' => 'node',
  '$name' => 'Person',
  '$data' => {
    'id' => 'rachel',
    'name' => 'rachel',
    'nano' => {
      '$skip' => 1
    },
    'friends' => {
      '$skip' => 1
    },
  },
});

reify

reify(Str $name, HashRef $data) : Object

The reify method constructs an object from the class name and data provided.

reify example #1

my $nano = Nano->new;

my $new_rachel = $nano->reify('Person', {
  id => 'rachel',
  name => 'rachel',
});

AUTHOR

Al Newkirk, awncorp@cpan.org

LICENSE

This is free software; you can redistribute it and/or modify it under the terms of the The Apache License, Version 2.0, as elucidated in the "license file".