duanbianweng5353
2016-09-21 07:32
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Symfony / Twig:表单小部件的内部ID?

I've to modify the radio_widget and would like to give the <label> and <input> the same ID, which should be unique for each pair.

Currently I'm using random(), but I'd prefer an internal counter, something like {{loop.index}} (Twig: for), to avoid conflicts.

{% block radio_widget -%}
    {% set id = random() %}
    <div class="radio">
        <label for="radio_{{ id }}">Label for {{ id }}</label>
        <input type="radio" id="radio_{{ id }}" {# ...#}/>
    </div>
{%- endblock radio_widget %}

Does anyone know a better solution?

Thanks in advance!

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3条回答 默认 最新

  • dongsui4658 2016-09-21 09:46
    最佳回答

    For every form-widget there already exists a pre-calculated unique id.

    See: \Symfony\Component\Form\Extension\Core\Type\BaseType::buildView

    In twig this ID is accessible through {{ form.vars.id }}.

    In essence the id is just a concatenation of the nested form-type names.


    Note that form.vars in general contains all the useful stuff you'd need to do form-customization. It's also the place to put custom values when using FormTypeInterface::buildView or FormTypeInterface::finishView to transport data to the form rendering.

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