put_script() defaults to mustache

[A80qWEHg]

Since 6.0 I have issues with stored scripts. The lang is set to "mustache" and therefore ES can't interpret them correctly. Also the resulting stored script is not always the same ?!

#!/usr/bin/perl -w
use strict; 
use Search::Elasticsearch 6.0;

my $e = Search::Elasticsearch->new;

# according to the documentation the lang defaults to painless
# --> https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-scripting-using.html

$e->put_script(
    id   => 'test',
    body => { 
        lang => 'painless',
        source => q(return), 
    },
);

print `curl -s localhost:9200/_scripts/test?pretty`;

By running this script multiple times I get two different outputs in random order:

{
  "_id" : "test",
  "found" : true,
  "script" : {
    "lang" : "mustache",
    "source" : "{\"source\":\"return\"}"
  }
}

{
  "_id" : "test",
  "found" : true,
  "script" : {
    "lang" : "mustache",
    "source" : "{\"lang\":\"painless\"}"
  }
}

Strange stuff!

This is perl 5, version 26, subversion 1 (v5.26.1) built for x86_64-linux
Version: 6.0.0, Build: 8f0685b/2017-11-10T18:41:22.859Z, JVM: 1.8.0_152

[clintongormley]

There are two issues here. First, you're using the wrong syntax, use this instead:

$e->put_script(
    id   => 'test',
    body => { 
        script => {
            lang => 'painless',
            source => q(return)
        }
    }
);

And second, a bug in Elasticsearch that it is accepting this malformed request. I have opened elastic/elasticsearch#27612 to get that fixed.

[A80qWEHg]

Thank you very much for your time and advice. Maybe you can update the example in https://metacpan.org/pod/Search::Elasticsearch::Client::6_0::Direct#put_script() as well?
That would be awesome.

[clintongormley]

Ah thanks for pointing that out. I've pushed a fix