How to set custom date to NULL in laravel?

Question

Laravel

In migration:
$table->timestamp('date_of'); // дата выдачи
I tried to set ->nullable() and ->default(NULL)
All the same, it adds the current date with time to the database.
Even changed to string. Maybe in the controller you need to set the date to null when adding an entry to the database?
When adding an order, the date must be empty, because the order has not been issued yet. And when editing, the date of issue is put.

Answer 1

The correct option for migrating timestamp for a field that can be NULL:
If this approach still sets the date, you need to look at what values ​​are passed from the controller, it is also possible that the mutator for this field is triggered.