Dynamic parameter in href option in Aurelia Routing config.map - aurelia

Question

This seems like a really simple issue, but it's driving me crazy...
Does anyone know how I can specify a dynamic :id parameter in the href routing configuration option?
The following unfortunately doesn't work:
config.map([
// ... default parameterless routing here
{
route:[':id/request'],
moduleId:'processes/bdd/request/request',
name:'Request', title:'Request', href:`#/bdd/request/${id}/request`, settings:{type:'Request', icon:''}, nav:true,
},
{
route:[':id/requestAuth'],
moduleId:'processes/bdd/request/requestauthorization',
name:'RequestAuthorization', title:'Request Authorization', href:`#/bdd/request/${id}/requestAuth`, settings:{type:'Request', icon:''}, nav:true,
},
// ... some additional mappings here
]);

Answer 1

The href property is static. If you want to generate a route for a link using this route, you could use the route-href custom attribute like this:
route-href="route: request; params.bind: { id: someProp }"
Note that I changed the route name to be camelCase (all lowercase since it is one word here) to match the route naming convention.

Answer 2

I had a similar use case and I was able to get this to work by adding a pipeline step to the router that alters the config on the fly.
My use case may be a little different in that I only want the item to appear in the nav bar when the route is active -- say I have routes /abc, /def/:id, and /ghi -- when the active route is ABC or GHI, only those items will appear in the nav bar, but when the active route is DEF, it should appear in the nav bar, and clicking it should lead to the same DEF ID you're currently looking at. So my route configuration includes a setting that indicates the route should only appear in the nav bar when it's the active route.
Here are the interesting parts of my actual configureRouter function:
configureRouter(config, router) {
config.addPreActivateStep(Preactivate); // explained below
config.map([
// some routes
{ route: 'patients/:patientId', name: 'patient-master',
moduleId: 'patients-and-cases/patient-master/patient-master',
title: 'Patient', nav: true, settings: { renderOnlyWhenActive: true },
href: '#' // it doesn't matter what this is
},
// more routes
]);
}
And here is the Preactivate class that sets the href on preactivate:
class Preactivate {
run(routingContext, next) {
routingContext.config.href = routingContext.fragment;
return next();
}
}
If, unlike me, you want this to display in a nav bar all the time, this will still work -- the href will simply remain set to the last thing it was set to when the route was active. In that case you'd probably want to initialize it to some default value that makes sense.