WTForms bootstrap macro

gistfile1.txt

{% macro render_field(field) %}
    <div class="form-group {% if field.errors %}has-error{% endif %}">
        {{ field.label(class_="control-label") }}
        {{ field(class_="form-control", **kwargs)|safe }}
        {% if field.errors %}
            {% for error in field.errors %}
                <span class="help-block">{{error}}</span>
            {% endfor %}
        {% endif %}
    </div>
{% endmacro %}