What's the best practice if you want to control the navigation from a service?

[nunoarruda]

After updating my app to 2.0.0-beta.7/Angular 2.0.0-rc.1 I cannot get a reference to the nav inside a service. I’ve tried the @ViewChild and NavController methods but both fail. I’m not an Angular expert so, is this normal behaviour?

I’ve also read that it might be a bad practice to control the view from a service and it should be done via events instead. Is that correct?

[xr0master]

Why can't I import NavController and ViewController into Service or App?

I’m attempting to inject NavController and ViewController into either my app.js file or a custom service. My objective is (or was) to pass the current view into a “LeftMenuManager” service class. Some pages I need the leftmenu to be disabled, others I do not. The LeftMenuManager service would be responsible for flipping the switch based on the view name. However, I’m unable to inject these dependencies - I get an error about “No provider for NavController…”. I get the sense that I’m doing som…

[nunoarruda]

Actually using getActiveNav() fixes my issue.

[rapropos]

@nunoarruda

I’ve also read that it might be a bad practice to control the view from a service and it should be done via events instead. Is that correct?

I absolutely think so. Services should live in service-land, completely independent of component-dom-land. Personally, every time I’ve felt the need to do what you’re doing, I’ve eventually ended up yelling at myself and redoing the design.

[Simteau]

Oh, that’s so honest. The endpoint of yelling at yourself, and starting again, is all too familiar along the learning path