Symfony Forms: HTML5 datalist

Question

How can be implemented HTML5 datalist with values from the database (Doctrine)?

Purpose: replace selects with many options to inputs with autocompletion.

Answer 1

I spent some time trying to solve this issue, and there is a quite simple solution which solves Konstantin's issue with database access. It is to create a new form type which has EntityType as it's parent.

class DatalistType extends AbstractType
{
    public function getParent() {
        return EntityType::class;
    }
}

You can then create a new template for this widget:

{# views/form/fields.html.twig #}
{% block datalist_widget %}
    
    
{% endblock %}

Finally, in the buildForm function of the form you are building, you can add your form element using the DatalistType, and using the EntityType options.

$builder->add('fieldName', DatalistType::class ,
        array('required' => false, 
              'label' => 'fieldLabel', 
              'class' => 'AppBundle\Entity\EntityName',
              'choice_label' => 'entityField'))