Config::Model::DumpAsData(3) Dump configuration content as a perl data structure


version 2.087


use Config::Model ;
use Data::Dumper ;
# define configuration tree object
my $model = Config::Model->new ;
$model ->create_config_class (
name => "MyClass",
element => [
[qw/foo bar/] => {
type => 'leaf',
value_type => 'string'
baz => {
type => 'hash',
index_type => 'string' ,
cargo => {
type => 'leaf',
value_type => 'string',
) ;
my $inst = $model->instance(root_class_name => 'MyClass' );
my $root = $inst->config_root ;
# put some data in config tree the hard way
$root->fetch_element('foo')->store('yada') ;
$root->fetch_element('bar')->store('bla bla') ;
$root->fetch_element('baz')->fetch_with_id('en')->store('hello') ;
# put more data the easy way
my $steps = 'baz:fr=bonjour baz:hr="dobar dan"';
$root->load( steps => $steps ) ;
print Dumper($root->dump_as_data);
# $VAR1 = {
# 'bar' => 'bla bla',
# 'baz' => {
# 'en' => 'hello',
# 'fr' => 'bonjour',
# 'hr' => 'dobar dan'
# },
# 'foo' => 'yada'
# };


This module is used directly by Config::Model::Node to dump the content of a configuration tree in perl data structure.

The perl data structure is a hash of hash. Only CheckList content is stored in an array ref.

Note that undefined values are skipped for list element. I.e. if a list element contains "('a',undef,'b')", the data structure then contains 'a','b'.


new ( )

No parameter. The constructor should be used only by Config::Model::Node.



Return a perl data structure

Parameters are:

Reference to a Config::Model::Node object. Mandatory
Also dump default values in the data structure. Useful if the dumped configuration data is used by the application. (default is yes)

Note that "mode" parameter is also accepted and overrides "full_dump" parameter. See ``fetch(...)'' in Config::Model::Value for details on "mode".

Skip node that have a "perl write" capability in their model. See Config::Model::BackendMgr.

This option must be used when using DumpAsData: to write back configuration data. When a configuration model contains several backends (one at the tree root and others in tree nodes), setting this option ensure that the ``root'' configuration file does not contain data duplicated in configuration file of others tree nodes.

Scan and create data for nodes elements even if no actual data was stored in them. This may be useful to trap missing mandatory values.
By default, ordered hash (i.e. the order of the keys are important) are dumped as Perl list. This is the faster way to dump such hashed while keeping the key order. But it's the less readable way.

When this parameter is 1 (default), the ordered hash is dumped as a list:

  my_hash => [ A => 'foo', B => 'bar', C => 'baz' ]

When this parameter is set as 0, the ordered hash is dumped with a special key that specifies the order of keys. E.g.:

  my_hash => {
   __my_hash_order => [ 'A', 'B', 'C' ] ,
   B => 'bar', A => 'foo', C => 'baz'



Return a string formatted in pod (See perlpod) with the annotations.

Parameters are:

Reference to a Config::Model::Node object. Mandatory
Yes, no or skip


Dominique Dumont, (ddumont at cpan dot org)


Dominique Dumont


This software is Copyright (c) 2005-2016 by Dominique Dumont.

This is free software, licensed under:

  The GNU Lesser General Public License, Version 2.1, February 1999