_formTheme.html.twig

{% use "bootstrap_3_layout.html.twig" %}

{% block form_row -%}
    {% set showErrorIcon = (not compound or force_error|default(false)) and not valid %}
    <div class="form-group {% if (not compound or force_error|default(false)) and not valid %} has-error{% endif %}{{ showErrorIcon ? ' has-feedback' : '' }}">
        {{- form_label(form) -}}
        {% if help|default %}
            {# set the aria-describedby attribute #}
            {%- set attr = attr|merge({'aria-describedby': 'help-block-'~id }) -%}
        {% endif %}
        {{- form_widget(form, {
            'attr': attr
        }) -}}
        {% if help|default %}
            <span class="help-block" id="help-block-{{ id }}">{{ help }}</span>
        {% endif %}
        {{- form_errors(form) -}}
    </div>
{%- endblock form_row %}

{% block form_widget_simple -%}
    {% set showErrorIcon = false %}
    {% if type is not defined or type not in ['file', 'hidden'] %}
        {# show error icon for these types #}
        {% set showErrorIcon = (not compound or force_error|default(false)) and not valid %}
    {% endif %}
    {{- parent() -}}
    {% if showErrorIcon %}
        <span class="glyphicon glyphicon-remove form-control-feedback" aria-hidden="true"></span>
    {% endif %}
{%- endblock form_widget_simple %}