vibed how do I convert form values into a struct automatically?

[Chris Bare]

On Wednesday, 10 November 2021 at 19:23:44 UTC, Chris Bare wrote:
> What am I missing?

I figured out part of it. In the html input element the name has 
to be employeeform.first_name.
but now I get a different error: Error handling field 
'employeeform.id': Missing form field.

I tried declaring the id as @optional, but that did not make a 
difference.
```d
struct Employee
{
	@optional long id;
	string first_name;
	string last_name;
}
```
Is there another way to indicate that a field does not have to be 
in the form?