I need to validate json files with json-schama in perl script. But unfortunately perl module JSON::Schema does not support the current version of json schema.

Cool, an opportunity to fix/improve something

Is there any way of validation json with json-schema draft 4 in perl?

Yes, SMOP :D

I have created a sample repo that shows the problem: https://github.com/bessarabov/playing_with_json_schema/

Ah yes, code on github, that uses "doker" that depends on npm ... the perfect and most simple and self contained way to demonstrate a problem ... directest way possible to ask perlmonks for help

http://search.cpan.org/grep?cpanid=TOBYINK&release=JSON-Schema-0.016&string=required&i=1&n=1&C=0

https://metacpan.org/source/TOBYINK/JSON-Schema-0.016/t/03required.t

#!/usr/bin/perl --
use strict;
use warnings;
use JSON::Schema;
use JSON::Hyper;
use JSON;
use Data::Dump qw/ dd /;
#~ http://cpansearch.perl.org/src/TOBYINK/JSON-Schema-0.016/examples/v
+alidation.pl

$JSON::Hyper::DEBUG = 1;

my $schema = q{{
    "properties" : {
        "name" : {
            "type" : "string"
        },
        "type" : {
            "enum" : [
                "dog",
                "cat"
            ],
            "type" : "string"
        }
    },
    "required" : [
        "name",
        "type"
    ],
    "type" : "object"
}};
my $data = q{{
    "nickname" : "Buddy",
    "type" : "dog"
}};

## hack
my $validator = JSON::Schema->new( $schema );
for my $prop ( @{  $validator->{schema}{required} } ){
    $validator->{schema}{properties}{$prop}{required}++;
}
my $json = decode_json( $data );
my $result = $validator->validate( $json );

dd( $validator, $json, $result );
print "$_\n" foreach $result->errors;

## wanted
#~ [ { keyword: 'required',
#~     dataPath: '',
#~     params: { missingProperty: 'name' },
#~     message: 'should have required property \'name\'' } ]
#~     
#~ 
#~ 

__END__
(
  bless({
    format => {},
    schema => {
                properties => {
                  name => { required => 1, type => "string" },
                  type => { enum => ["dog", "cat"], required => 1, typ
+e => "string" },
                },
                required => ["name", "type"],
                type => "object",
              },
  }, "JSON::Schema"),
  { nickname => "Buddy", type => "dog" },
  bless({
    errors => [
                { message => "is missing and it is required", property
+ => "\$.name" },
              ],
    valid  => "",
  }, "JSON::Schema::Result"),
)
$.name: is missing and it is required
[download]