<div class="form-group {% if field.errors %}has-error{% endif %}">
<div class="checkbox">
    <label>
        <input type="checkbox" name="{{ field.name }}" value="true"
        {% if field.value %}checked{% endif %}
        >
        {% if field.label %}{{ field.label }}{% endif %}
    </label>
</div>
{% if field.errors %}
    {% for error in field.errors %}<span class="help-block">{{ error }}</span>{% endfor %}
{% endif %}
{% if field.help_text %}
    <span class="help-block">{{ field.help_text|safe }}</span>
{% endif %}
</div>
