afterModel emberjs中的过渡参数

Question

i don't understand why the afterModel method get a transition parameter, and what its represent (yeah a transition from one page to the other, but in afterModel method there is no transition running, and that the prupose of afterModel , starting a transition if required, using model data.)

http://emberjs.com/api/classes/Ember.Route.html#method_afterModel

Answer 1

The afterModel hook is the third of the three model hookes, which all run before the transition is done.

So the transition in afterModel is the same then in beforeModel .

The difference is that sometimes you need the model to decide if you want to abort the transition and redirect to somewhere else or not.

A example could be a /userEdit/:user_id route where admins can edit all users and normal users only can edit their own user. In the beforeModel you could check if the the user is admin and if not but you can't abort the transition based on information on the model. In the atferModel hook you can do exactly this, and save the transition away to may retry it later, for example after the user got admin privileges.

The router does not enter the route after the Promise returned by the afterModel hook resolves.