title: elasticsearch set sort order using querystring
body: <p>I have the following simple elastisearch query:</p>
  
  <pre><code>http://localhost:9200/apn/presupuesto/_search?q=subcuenta:penal&amp;sort=anio
  </code></pre>
  
  <p>And it works fine</p>
  
  <p>Now I'm trying to order by anio desc. I tried with all these options:</p>
  
  <pre><code>...l&amp;sort=anio desc
  
  ...l&amp;sort=-anio
  
  ...l&amp;sort=anio&amp;order=desc
  </code></pre>
  
  <p>But none of them seemed to work</p>
  
  <p>How can I achieve it? (ideally, from the querystring, without having to use a more complex query)</p>