预期参数类型为“AppBundle \ Entity \ Sales”，“DateTime”

Regardless of date format used (Symfony 3.3.14), the error in title appears on submitting a form with the following field definition:

use Symfony\Component\Form\Extension\Core\Type\DateType;
...

    $builder
        ->add('sales', DateType::class, [
            'widget' => 'single_text',
            'html5' => false,
            'attr' => ['class' => 'js-datepicker'],
            'format' => 'mm-dd-yyyy',
            ])

and with the associated javascript

$('.js-datepicker').datepicker({
    format: 'mm-dd-yyyy'
});

as called in the template with

{{ form_row(form.sales) }}
...
    {%  block javascripts %}
        {{ parent() }}
        <script src="/js/bootstrap-datepicker.js"></script>
        <script src="/js/tickets.js"></script>
    {%  endblock javascripts %}

DOH!

The entity definition that included the sales field some how got

public function setSales(Sales $sales)
{
    $this->sales = $sales;

    return $this;
}

when it should have been

public function setSales($sales)
{
    $this->sales = $sales;

    return $this;
}