Route model hook is not run on transition in Ember 2.15

[mani-mishra]

In ember 2.15, route's model doesn't run when transitioning from a parent route.
For example:
If the app is currentnly, at /student and displays student list, selecting a student, transitions to student/<id>. The model hook in route for student/<id> is not run.
All other hooks run, in order of beforeModel => afterModel => setupController

This doesn't happen, when I directly load the route via hard refresh of student/<id>.

Previous to ember 2.15, hooks run in beforeModel => model => afterModel => setupController in all cases.

[rwjblue]

We have a number of tests in this area that are not showing a regression so I suspect that what you are experiencing is situational or dependent on some other factors. Can you create a reproduction that shows the problem you are describing?

[mani-mishra]

@rwjblue On more detailed debugging, the issue that we are seeing is a result of #15621. We are trying to pass the id param of the route, from a partial, which comes as undefined.

I'll close this issue.

[rwjblue]

Thanks for following up, we're trying to prioritize #15621 so we can get a fix out soonish. Sorry for the delays there.