Error message: routeHandler.get is not a function

[siva-sundar]

Describe the bug

Getting the following error while switching to the Routes tab of the inspector. No data is being shown on the Routes tab due to this error.

To Reproduce
Steps to reproduce the behavior:

1. Open Ember inspector
2. Click on Routes
3. See the error routeHandler.get is not a function on the console.

Screenshots

Environment
Ember version: 3.4.8
Browser: Chrome 80.0.3987.163

[RobbieTheWagner]

The relevant code for this is here

ember-inspector/ember_debug/route-debug.js

Line 166 in f1ab36a

routeHandler = routerLib.getHandler(handler);

@chancancode @pzuraq any reason why getHandler would be giving back a result that does not have a get method?

[VasylMarchuk]

I have this issue as well, and I thought it might be related to using ember-engines

[RobbieTheWagner]

@siva-sundar are you using engines as well?

[siva-sundar]

@rwwagner90 Yes

[siva-sundar]

The issue is that the routes tab will try to list all the route instances. But we are getting this error while trying to list the routes of an engine which is not mounted.

[siva-sundar]

The possible solution would be to lazily list the routes of engine once its mounted.

[RobbieTheWagner]

@siva-sundar I do not know anything about engines, but if you have a fix in mind, we would welcome a PR to make this work! There is a lot to do to support engines in general, and we would love help from someone who uses them and knows about them.

[steventsao]

Supporting engines would resolve this issue. #632

routeHandler.get is not a function errors because routeHandler is an unresolved Promise.

[RobbieTheWagner]

I don't know how to support engines. There was a spike by @cyril-sf at one point, but I don't think we ever got anything over the finish line. @chancancode I would be happy to pair with someone on engines support, I just have no idea how to make things work myself.

[cyril-sf]

@rwwagner90 Sorry for never finishing the feature. You can find my code (at least when I stopped) here : cyril-sf@ff5f266

[RobbieTheWagner]

Thanks @cyril-sf! @chancancode do we have an idea of what engines support should look like? If I have a goal in mind, perhaps I can build on the work Cyril did.