[Symfony 2 / Bootstrap 3] Form errors in tooltips or popovers

bootstrap_3_layout.html.twig

{% extends 'bootstrap_3_layout.html.twig' %}

{% block form_row -%}
    {% if (form_errors_in_tooltip is defined and form_errors_in_tooltip) or (form_errors_in_popover is defined and form_errors_in_popover) %}
        <div class="form-group{% if (not compound or force_error|default(false)) and not valid %} has-error{% endif %}">
            {{ form_label(form) }}
            {{ form_errors(form) }}
            {{ form_widget(form) }}
        </div>
    {% else %}
        {{ parent() }}
    {% endif %}
{%- endblock form_row %}

{% block form_errors -%}
    {% if errors|length > 0 -%}
        {% if (form_errors_in_tooltip is defined and form_errors_in_tooltip) or (form_errors_in_popover is defined and form_errors_in_popover) %}
            {% set error_message = '<ul class="list-unstyled">' %}
            {%- for error in errors -%}
                {% set error_message = error_message ~ '<li>' ~ error.message ~ '</li>' %}
            {%- endfor -%}
            {% set error_message = error_message ~ '</ul>' %}
            {% set error_message = error_message|raw %}

            {% if form_errors_in_tooltip is defined and form_errors_in_tooltip %}
                <i class="fa fa-warning" data-toggle="tooltip" data-html="true" data-placement="top" title="{{ error_message }}"></i>
            {% else %}
                <i class="fa fa-warning" data-toggle="popover" data-html="true" data-placement="top" data-trigger="hover" title="Erreur(s)" data-content="{{ error_message }}"></i>
            {%- endif %}
        {% else %}
            {{ parent() }}
        {% endif %}
    {%- endif %}
{%- endblock form_errors %}

form.html.twig

...
{{ form_row(form.tooltip, { 'form_errors_in_tooltip': true }) }}
{{ form_row(form.popover, { 'form_errors_in_popover': true }) }}
{{ form_row(form.classic) }}
...