Symfony forms - Expected argument of type "string", "DateTime" given

Question

I get this error message:

"Expected argument of type "string", "DateTime" given"

This is the code of my form in symfony

$builder->add('dateOfBirth', 'datetime', [
    'widget' => 'single_text',
    'label'  => 'Geboortedatum',
    'attr' => ['class' => 'form-control birthdaypicker'],
    'label_attr' => ['class' => 'col-sm-2 control-label']
]);

And this is the template:

<div class="form-group">
    {{ form_label(form_pupil.dateOfBirth) }}
    <div class="col-sm-10">
        {{ form_widget(form_pupil.dateOfBirth) }}
        <small>{{ form_errors(form_pupil.dateOfBirth) }}</small>
    </div>
</div>

Document (Entity)

/**
 * @MongoDB\Date
 * @Assert\NotBlank(message="Een geboortedatum is vereist")
 * @Assert\Length(max=10, maxMessage="Een geboortedatum kan maximaal 10 karakters bevatten")
 */
 protected $dateOfBirth;

In my document(entity) it's also a date type. I have no idea why Symfony expects a string..

Can you post more details about the error message? Is it coming from Symfony form/validation or from Doctrine ODM? — Florian Eckerstorfer
– Florian Eckerstorfer, Commented Mar 18, 2014 at 11:06
vendor/symfony/symfony/src/Symfony/Component/Validator/Constraints/LengthValidator.php at line 33 - } if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) { throw new UnexpectedTypeException($value, 'string'); } $stringValue = (string) $value; — Mathias Dewelde
– Mathias Dewelde, Commented Mar 18, 2014 at 11:13
In case anyone hits this error, I came across when I had an invalid validation rule in a validation.yml config file. — Halfstop
– Halfstop, Commented Feb 28, 2016 at 21:40

Mathias Dewelde · Accepted Answer · 2014-03-18 11:17:48Z

3

@Assert\Length(max=10, maxMessage="Een geboortedatum kan maximaal 10 karakters bevatten")

Can't check the length of a datetime object! (removed this assert and it worked)

answered Mar 18, 2014 at 11:17

Mathias Dewelde

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Goku · Accepted Answer · 2014-03-18 11:07:32Z

0

Try this :

$builder->add('dateOfBirth', 'datetime', [
    'data' => new \DateTime(),
    'widget' => 'single_text',
    'label'  => 'Geboortedatum',
    'attr' => ['class' => 'form-control birthdaypicker'],
    'label_attr' => ['class' => 'col-sm-2 control-label']
]);

answered Mar 18, 2014 at 11:07

Goku

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4 Comments

Mathias Dewelde Over a year ago

Can't use \DateTime(), Mongo doesn't support datetime and i only need date.

Goku Over a year ago

if you replace datetime by date removing 'data' => new \DateTime(), line it works ?

Mathias Dewelde Over a year ago

I changed the second parameter of add to date. And removed the 'data' in the third parameter array. But the main problem was the assert validation in my Document. I used @Assert\Length on a date object. Which caused the error.

Goku Over a year ago

why do not you do the check to the creation of form?

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