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Wildcard routes (dynamic URL segments)

Use wildcard routes so one page can serve many URLs with dynamic segments—for example a single “guided course” page that works for every course and module: /app/guided-courses/foundations/module-1, /app/guided-courses/advanced/lesson-5, and so on.

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How it works

  • You create one page whose URL pattern includes placeholders like {course} and {module}.
  • When a visitor opens a URL that matches that pattern, they see that page, and the segments from the URL are available in the template as route_params (and as route_slug).
  • You can have multiple such pages with different patterns (e.g. one for courses, one for workshops).
Placeholders use curly braces so they’re safe in filenames and easy to read: {course}, {module}, {id}, etc.

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Setting up a wildcard route

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1. Create the page

In the app, create a page that will handle all URLs under a path, for example:
  • Path/slug pattern: app/guided-courses/{course}/{module}
So:
  • The fixed part is: app/guided-courses
  • The dynamic parts are: {course} and {module}
Use the exact pattern (including the placeholders) as the page’s slug in the app. The number of placeholders must match the number of segments after the fixed part (e.g. two placeholders → two segments).

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2. What URLs will match

Once that page exists, URLs like these will all show the same page, with different segment values:
URLroute_params.courseroute_params.module
/app/guided-courses/foundations/module-1foundationsmodule-1
/app/guided-courses/advanced/lesson-5advancedlesson-5
/app/guided-courses/intro/welcomeintrowelcome
The exact URL /app/guided-courses (no extra segments) also matches this page; in that case there are no dynamic segments, so route_params will be empty/null as appropriate.

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Using the segments in your template

Two things are available in the template:
  • route_params – Object with one key per placeholder, e.g. { course: 'foundations', module: 'module-1' }. Use this when you named your placeholders (e.g. {course}, {module}).
  • route_slug – The full “rest of the path” as one string, e.g. foundations/module-1. Useful when you have a single placeholder or want the whole tail.

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Displaying the current segment

<p>Course: {{ route_params.course }}</p>
<p>Module: {{ route_params.module }}</p>

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Using the course slug in a template function

For a guided-course page you often want to load the course by the slug from the URL: 
@set(course = getCourseBySlug(route_params.course))
@if(course)
  <h1>{{ course.title }}</h1>
  ...
@endif
You must pass the slug explicitly (e.g. route_params.course); getCourseBySlug does not read the URL by itself.

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Single dynamic segment

If your page slug is something like app/guided-course/{slug} (one placeholder), then you have one segment:
  • route_params.segment_0 – The first (and only) segment, e.g. intro-to-js.
  • route_slug – Same value, e.g. intro-to-js.
Example: 
@set(course = getCourseBySlug(route_params.segment_0))

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Checking that segments exist

For non-wildcard URLs, route_params and route_slug are not set (or are null). You can guard your logic: 
@if(route_params and route_params.course)
  @set(course = getCourseBySlug(route_params.course))
  ...
@endif

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Examples

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One placeholder: “course by slug”

  • Page slug: app/guided-course/{slug}
  • URLs: /app/guided-course/foundations, /app/guided-course/advanced, …
  • In template: route_params.segment_0 or route_slug is the course slug (e.g. foundations). Pass it to getCourseBySlug(route_params.segment_0).

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Two placeholders: “course + module”

  • Page slug: app/guided-courses/{course}/{module}
  • URLs: /app/guided-courses/foundations/module-1, …
  • In template: route_params.course, route_params.module. Use getCourseBySlug(route_params.course) and then use route_params.module to pick the right module or lesson.

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More segments

You can use as many placeholders as you need, for example:
  • Page slug: learn/{topic}/{level}/{lesson}
  • URL: /learn/javascript/beginner/01-variables
  • In template: route_params.topic, route_params.level, route_params.lesson.

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Tips

  • Placeholder names – Use names that make sense in your template (e.g. course, module, lesson). They become the keys of route_params.
  • Same page, many URLs – One page with a wildcard slug serves every matching URL; the content can change based on route_params and route_slug.
  • Multiple wildcard pages – You can have several pages with different patterns (e.g. app/guided-courses/{course}/{module} and app/workshops/{slug}). Each pattern is matched separately; the right page is chosen by the URL.

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Summary

You want…Page slug (in app)In template
One segment (e.g. course slug)app/guided-course/{slug}route_params.segment_0 or route_slug
Named segments (e.g. course + module)app/guided-courses/{course}/{module}route_params.course, route_params.module
Full remainder as one stringAny wildcard pageroute_slug
Use {name} in the slug for each dynamic part, then use route_params.name (or route_slug) in the template to drive your content and logic.

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Using a wildcard segment to drive locale ({hl})

If you want clean URLs like /en/about or /pt-br/checkout to switch the active locale, capture the locale segment with a placeholder named hl (or any name you prefer, then read it from route_params and pass it through ?hl=).
  • Page slug: {hl}/about
  • URL: /en/about, /pt-br/about
  • In template: route_params.hl is en / pt-br
The runtime’s locale resolver reads req.params.hl first when picking the active locale. See Internationalization (i18n) for the full precedence chain (hl path segment → ?hl → ?locale → ?lang → session/domain/brand defaults → Accept-Language).