title: nested array element count based on index
body: <p>my documents are like this</p>
  
  <pre><code>{"_id":"5de7fdb37d444b7a49236c83","list_id":[[3,2,4]]}
  {"_id":"5de7fdb37d444b7a49236c83","list_id":[[2,4]]}
  {"_id":"5de7fdb37d444b7a49236c83","list_id":[[3,2]]}
  </code></pre>
  
  <p>how can i count based on list id elemnts 3 , 2 ,4.</p>
  
  <p>they are nested array element..</p>
  
  <p>i tried</p>
  
  <pre><code>$usersQuery = $this-&gt;dm-&gt;createQueryBuilder(ClientUser::class)
          -&gt;field('list_id.0.0')
          -&gt;equals([2])
          -&gt;getQuery();
          $usersCount = $usersQuery-&gt;count();
  </code></pre>
  
  <p>for 1st elemnt usercount is 1 which is fine ,
  but for other element like 2 and 4 , query doesnt work .
  like i tried</p>
  
  <pre><code> $usersQuery = $this-&gt;dm-&gt;createQueryBuildebut r(ClientUser::class)
          -&gt;field('list_id.0.1')
          -&gt;equals(3)-&gt;count(); (edited) 
  or
    $usersQuery = $this-&gt;dm-&gt;createQueryBuilder(ClientUser::class)
          -&gt;field('list_id.0.1')
          -&gt;equals([3])
          -&gt;getQuery()-&gt;count();
  </code></pre>
  
  <p>it is not working for consecutive array element
  please suggest</p>