php - Symfony 5 $form->isSubmitted() Returning False for File Upload

Solution:

For form classes derived from AbstractType, the form is named using when it's built through .

Now, $form->handleRequest method as implemented performs a number of checks through the request handler before submitting the form.

1. Checks the method matches that of the form
2. Checks the name of the form is present in the request if the form has a name
3. Checks that at least one of the form fields are filled if the form has no name

Your form is not submitting through the request handler handleRequest method because fields in the request are not properly mapped together with your form name.

You have to map the form name in your HTTP POST request in following way:

[ "user_file" =>  [ "file" => <uploaded file> ] ]

This may prove to not be straight forward in Postman. Therefore I recommend to implement your form as a nameless form instead by overriding getBlockPrefix to return an empty string.

class UserFileType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        //...
    }

    public function getBlockPrefix()
    {
        return '';
    }

}

Solution:

Since this is the first SO thread that comes up for the keywords handlerequest issubmitted false, I thought I would share what worked for my team on an adjacent issue.

We were getting a false response when doing a PATCH request. We eventually realized that we were neglecting to pass Request::METHOD_PATCH in the method option when creatin the form. Putting in a ternary statement that set that value was enough to solve our problem.

I hope this helps someone.