title: Omines DataTables does not load data to table on Symfony 4
body: <p>I have problem with load data to my table. I tried to use ArrayAdapter from example in documentation <a href="https://omines.github.io/datatables-bundle/" rel="nofollow noreferrer">https://omines.github.io/datatables-bundle/</a> but is also does not load data. I have only title of column. Aby idea ? All ajax request are ok.</p>
  
  <p>Here is action:</p>
  
  <pre><code>public function listCalls(Request $request)
  {
      $table = $this-&gt;createDataTable()
          -&gt;add('id', TextColumn::class, [
              'label' =&gt; 'id'
          ])
          -&gt;createAdapter(ORMAdapter::class, [
              'entity' =&gt; Call::class,
              'query' =&gt; function (QueryBuilder $builder) {
                  $builder
                      -&gt;select('c')
                      -&gt;from(Call::class, 'c')
                  ;
              },
          ])
          -&gt;handleRequest($request);
  
      if ($table-&gt;isCallback()) {
          return $table-&gt;getResponse();
      }
  
      return $this-&gt;render('shop/calls_list.html.twig', [
          'datatable' =&gt; $table
      ]);
  }
  </code></pre>
  
  <p>And here is view:</p>
  
  <pre><code>{% extends "shop/base.html.twig" %}
  
  {% block title %}List{% endblock %}
  
  {% block content %}
      &lt;div id="presidents"&gt;Loading...&lt;/div&gt;
  {% endblock %}
  {% block scripts %}
      &lt;script src="{{ asset('bundles/datatables/js/datatables.js') }}"&gt;&lt;/script&gt;
      &lt;script&gt;
          $(function() {
              $('#presidents').initDataTables({{ datatable_settings(datatable) }});
          });
      &lt;/script&gt;
  {% endblock %}
  </code></pre>