Cypher distinct aggregation returns null when query is started form a Neo4j::Rails::Model

[dre-hh]

(Beer.all.query {|n| n.as(:beer)[:style].distinct}).to_a
=> [nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil]

But

Neo4j._query (Beer.all.query {|n| n.as(:beer)[:style].distinct}).to_s

=> [{:"(beer.style)"=>"Lager"},
 {:"(beer.style)"=>"Abteibier"},
 {:"(beer.style)"=>"India Pale Ale (IPA)"},
 {:"(beer.style)"=>"Porter"},
 {:"(beer.style)"=>"Wit Bier"},
 {:"(beer.style)"=>"Belgisches Kirschbier"},
 {:"(beer.style)"=>"Rauchbier Märzen"},
 {:"(beer.style)"=>"Belgisches Trappistenbier"},
 {:"(beer.style)"=>"Red Ale"},
 {:"(beer.style)"=>"Californian Pale Ale"},
 {:"(beer.style)"=>"Weizen-Eisbock"},
 {:"(beer.style)"=>"Kellerbier"},
 {:"(beer.style)"=>"Ale"},
 {:"(beer.style)"=>"Weizenbock"},
 {:"(beer.style)"=>"American Amber Lager"},
 {:"(beer.style)"=>"Pale Ale"},
 {:"(beer.style)"=>"Weizendoppelbock"}]

#Gemfile

gem 'neo4j-community', "~> 1.9.5"
gem 'neo4j', github: 'andreasronge/neo4j', branch: 'rails4'

[andreasronge]

Closed it because it is very old issue.