Route parameter matchers give you the ability to enforce requirements upon the parameter in order for a given route to match a request.
If you'd like to learn more about route parameters and their matchers, check out our lesson "Dynamic Routing with Route Parameters".
In the below snippet, the route parameter matcher (defined by the where method) is restricting this
profiles.show route to only match if the username param specifically begins with @.
/@adocasts matches route
/adocasts does not match
// start/routes.ts Route.get('/:username', 'ProfilesController.show') .as('profiles.show') .where('username', /^@/)
By forcing our
username param to start with
@, we're able to simplify our
profiles.show route, while still making use of other
/something routes within our application.
// will only match if username starts with @ // if username does NOT start with @, this route will be bypassed Route.get('/:username', 'ProfilesController.show') .as('profiles.show') .where('username', /^@/) // when the previous route is bypassed, it'll be used to match this route Route.get('/:slug', 'PostsController.show').as('posts.show')