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https://issues.apache.org/jira/browse/SOLR-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706435#action_12706435
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Yonik Seeley commented on SOLR-1148:
------------------------------------

Are you passing a parameter that is causing Solr to return a hash?  The default 
for JSON/Python/Ruby is to return an array when order is important.

http://localhost:8983/solr/select?q=*:*&facet=on&facet.field=cat&wt=ruby&indent=on

{code}
  'facet_fields'=>{
        'cat'=>[
         'electronics',14,
         'memory',3,
         'card',2,
         'connector',2,
         'drive',2,
         'graphics',2,
         'hard',2,
         'monitor',2,
         'search',2,
         'software',2,
         'camera',1,
         'copier',1,
         'multifunction',1,
         'music',1,
         'printer',1,
         'scanner',1]},
{code}

> with code generated by the RubyWriter sorted facets are are actually unsorted 
> in Ruby 1.8
> -----------------------------------------------------------------------------------------
>
>                 Key: SOLR-1148
>                 URL: https://issues.apache.org/jira/browse/SOLR-1148
>             Project: Solr
>          Issue Type: Bug
>          Components: clients - ruby - flare
>    Affects Versions: 1.3
>            Reporter: Max Schöfmann
>            Priority: Minor
>
> Facet counts are returned as ruby Hash, which is unordered in Ruby 1.8. After 
> evaling the hash, the sorting order is lost and the client program needs to 
> re-sort the data.
> A fix would be returning facet counts as array of pairs, instead, e.g. 
>  [['foo', 10], ['bar', 8], ['baz', 6]]

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