How to set the desired data format in symphony2 before validation?

Question

symfony

I have a form where there are fields with a checkbox and a datetime field on which the datepicker hangs.
1) I removed the checkbox validation. In Entity, this field has a boolean value. If the checkbox is checked, then 1, but if not, then an empty value, a should be 0.
2) How to convert the datetimepicker value Y/m/d h:ito Y-m-d H:i:0.
Tried for checbox via transformer data, but didn't work. And it seems to me that this is not quite the right way.

Answer 1

hmm, a bit of code...

Answer 2

It's probably better to configure the datetimepicker in js to the format used in the form. Or vice versa, configure the form to the datetimepicker format. Why bother with crutches?
For a form it's like this:

$builder->add('date', DateType::class, array(
    'widget' => 'single_text',
    // this is actually the default format for single_text
    'format' => 'yyyy-MM-dd',
));

Answer 3

I will answer the first part of the question.
There was a discussion on github regarding checkboxes. I can't find it now.
In general, you will not get the coveted zero, since the checkbox was implied as a boolean mandatory value.
Use ChoiceType and be happy.
The second one has already been answered.