{% if form.vars.choices is defined %}
    <div class="col-lg-6 form-group">
        <label class="sr-only">{{ form_label(form) }}</label>
        {{ form_widget(form, {'attr' : {'class' : 'form-control', 'placeholder' : form.vars.label}}) }}
    </div>
{% else %}
    <div class="col-lg-6 form-group">
        <label class="sr-only">{{ form_label(form) }}</label>
        {{ form_widget(form, {'attr' : {'class' : 'form-control', 'placeholder' : form.vars.label}}) }}
    </div>
{% endif %}