"Unknown format "html""

[catasoft]

Hello,
I use sonata with Symfony, but I also tried a route in a controller outside of sonata and the error is the same.

public function reportType2Action(Request $request, $id) {
   //...
    return $this->render('DataBundle:DataValue:report-type2.xls.twig', array('entities' => $query->getResult()));
}

Template file:

{# DataBundle:DataValue:report-type2.xls.twig #}
{% xlsdocument %}
    {% xlssheet 'Worksheet' %}
        {% xlsrow %}
            {% xlscell %}{% trans %}IA Id{% endtrans %}{% endxlscell %}

        {% endxlsrow %}
        {% for r in entities %}
            {% if r.reference is not empty %}
                {% xlsrow %}
                    {% xlscell %}{{ r.value.evidenceLevel }}{% endxlscell %}
                {% endxlsrow %}
            {% endif %}
        {% endfor %}
    {% endxlssheet %}
{% endxlsdocument %}

Somehow, in PhpExcelWrapper.php, startDocument($properties) is called with an empty array instead of [format: 'xls'].

Thank you for your help!
Catalin

[catasoft]

Found the solution: apparently one has to configure twig like this:
{% xlsdocument {format: 'xls'} %}
If you could make this clearer in the docs it would be great: it isn't intuitive at all from the example in the Getting Started guide.