title: How to pass boolean default value in router?
body: <p>Let's say I have a history portal and I got something like this in my router: 
  <code>article/{century}/{decade}/{year}/{month}/{day}</code><br>
  The problem is that my controller have boolean default values for all these variables (false), because the business logic should decide what to show without specifying a date.<br>
  How can I do this without specifying multiple routes for this?</p>