How to display a month-year dropdown in Symfony2

Question

In my application, the user hsa to give a date by only selecting a month and a year in two dropdown lists. How can I achieve that?

Here is what I\'ve tried so far :

Answer 1

@Oleg was pretty close to the correct answer. You have to use a view transformer to make sure that the DateTime gets a day.

/* In your formType.php */

$builder->add(
   $builder->create('date1', 'date', array(
       'format'      => 'MMMM-yyyyd', // you need to have 'y', 'M' and 'd' here
       'years'       => range(date('Y'), date('Y') - 30, -1)
   ))
   ->addViewTransformer(new IncompleteDateTransformer()));
)

Create a transformer:

class IncompleteDateTransformer implements DataTransformerInterface
{
/**
 * Do nothing when transforming from norm -> view
 */
public function transform($object)
{
    return $object;
}

/**
 * If some components of the date is missing we'll add those. 
 * This reverse transform will work when month and/or day is missing
 *
 */
public function reverseTransform($date)
{
    if (!is_array($date)) {
        return $date;
    }

    if (empty($date['year'])) {
        return $date;
    }

    if (empty($date['day'])) {
        $date['day']=1;
    }

    if (empty($date['month'])) {
        $date['month']=1;
    }

    return $date;
}
} 

Create a twig template where you use a custom form theme from the file itself:

{# example.html.twig #}
{% form_theme form _self %}

{% block date_widget %}
{% spaceless %}
    {% if widget == 'single_text' %}
        {{ block('field_widget') }}
    {% else %}
        

            

                {{ date_pattern|replace({
                '{{ year }}': form_widget(form.year),
                '{{ month }}': form_widget(form.month),
                '{{ day }}':  '',
                })|raw }}
            
        
    {% endif %}
{% endspaceless %}
{% endblock date_widget %}

Select a date
{{ form(form) }}

References:

• Data transformers
• Form customization
• Choice type