title: Unknown key for a VALUE_STRING in [index]
body: <p>I'm trying to find a way where I can build my <code>$params</code> array using the native syntax to search for a post which name is equal to 'test':</p>
  <pre><code>$params = [
      &quot;index&quot; =&gt; &quot;post_index&quot;,
      &quot;type&quot; =&gt; &quot;post&quot;,
      'body' =&gt; [
          'query' =&gt; [
              'match' =&gt; [
                  'name' =&gt; 'test'
              ]
          ]
      ]
  ];
  $result = $finder-&gt;find($params);
  </code></pre>
  <p>Unfortunately I'm getting this error:</p>
  <blockquote>
  <p>Unknown key for a VALUE_STRING in [index].</p>
  </blockquote>
  <p>I know that I can use some <code>Elastic\Query\Match</code> to build my query.</p>