{% load form_helpers %}
<div class="panel panel-default">
    <div class="panel-heading"><strong>Cable</strong></div>
    <div class="panel-body">
        {% render_field form.status %}
        {% render_field form.type %}
        {% render_field form.label %}
        {% render_field form.color %}
        <div class="form-group">
            <label class="col-md-3 control-label" for="id_length">{{ form.length.label }}</label>
            <div class="col-md-5">
                {{ form.length }}
                {% if form.length.errors %}
                    <ul>
                        {% for error in form.length.errors %}
                            <li class="text-danger">{{ error }}</li>
                        {% endfor %}
                    </ul>
                {% endif %}
            </div>
            <div class="col-md-4">
                {{ form.length_unit }}
                {% if form.length_unit.errors %}
                    <ul>
                        {% for error in form.length_unit.errors %}
                            <li class="text-danger">{{ error }}</li>
                        {% endfor %}
                    </ul>
                {% endif %}
            </div>
        </div>
    </div>
</div>
