Routing with optional parameters for webform is just giving page not found

Question

I created my webform to accept parameters via a standard $_GET and this works fine but is quite unsecure I am told and should rather use clean URL's via Drupal 8 built in Routing.

As such I set up a module to support my webform and contains only a info.yml and routing.ynl. The routing is as below, I got the format from Using parameters in routes but suspect I just haven't grasped it.

abc_enquire_form_routing.webform:
  path: /form/enquire/{type}/{region}/{destination}
  requirements:
    _permission: 'access content'
  defaults:
    type: 'tailor-made-holidays'

Normal form access is via http://abcsite.localhost/form/enquire

Form access with parameters as a get (For illustration) was: http://abcsite.localhost/form/enquire?type=tailor-made-holidays&region=asia&destination=48

Module name is: abc_enquire_form_routing

Trying to access the form with the module enabled with the above routing through http://abcsite.localhost/form/enquire/tailor-made-holidays is simply giving me a p "The requested page could not be found." error. So I can only assume I am doing the routing wrong.

What I am trying to achieve is three optional parameters after the "http://abcsite.localhost/form/enquire" page of the url, e.g. http://abcsite.localhost/form/enquire/tailor-made-holidays/asia/49

Can anyone point me in the direction of a good example of doing this with webforms module ?

Answer 1

I found really weird the response from jrockowitz. Because what you are asking is indeed possible.

If someone else needs a proper response for this question, then you can easily do this:

abc_enquire_form_routing.webform:
  path: /form/enquire/{type?}/{region?}/{destination?}
  requirements:
    _permission: 'access content'
  defaults:
    type: 'tailor-made-holidays'

That way if don't add the last three parameters you won't receive any error at all.

And of course you can use them as you want in your controller :)

Btw, you can also remove the defaults key if you don't need it:

 abc_enquire_form_routing.webform:
  path: /form/enquire/{type?}/{region?}/{destination?}
  requirements:
    _permission: 'access content'

Remember to clear your cache after this implementation.