bug: TypeError: Cannot read property 'backButtonTextLeft' of null

[matheusrocha89]

Type: bug

Platform: desktop browser

Hi everyone,
After I remove the cache of a view using the attr cache-view="false" the console starts to show an error:

TypeError: Cannot read property 'backButtonTextLeft' of null

This happens when I add false to cache-view, then navigate to another view and click on back button, to come back to the view that I put the cache attr as false.

There is a little discussion on ionic forum after I opened a question there

[wlkns]

I am also having this issue as of the latest update ([email protected]). I am using the {cache: false} directive in my routes, and it is happening browsing around using Chrome, have not tested on a device yet.

[adaptivedev]

Me too.

It currently happens when I go by to my default or starting state, e.g. "app.goals-my":

$urlRouterProvider.otherwise('/app/goals-my');

ionic.bundle.js:19387 TypeError: Cannot read property 'backButtonTextLeft' of null
at leave (http://localhost:8100/lib/ionic/js/ionic.bundle.js:43279:49)
at Object.IonicModule.provider.provider.transitions.navBar.ios.run (http://localhost:8100/lib/ionic/js/ionic.bundle.js:43288:11)
at IonicModule.controller.self.transition (http://localhost:8100/lib/ionic/js/ionic.bundle.js:46933:22)
at IonicModule.controller.self.update (http://localhost:8100/lib/ionic/js/ionic.bundle.js:46906:10)
at IonicModule.controller.self.beforeEnter (http://localhost:8100/lib/ionic/js/ionic.bundle.js:47240:52)
at IonicModule.controller.self.beforeEnter (http://localhost:8100/lib/ionic/js/ionic.bundle.js:48219:19)
at Scope.$get.Scope.$emit (http://localhost:8100/lib/ionic/js/ionic.bundle.js:22423:33)
at Object.IonicModule.factory.ionicViewSwitcher.create.switcher.emit (http://localhost:8100/lib/ionic/js/ionic.bundle.js:45968:19)
at Object.IonicModule.factory.ionicViewSwitcher.create.switcher.transition (http://localhost:8100/lib/ionic/js/ionic.bundle.js:45893:20)
at http://localhost:8100/lib/ionic/js/ionic.bundle.js:47229:16

RoverMR-2:sidemenu rover$ ionic --version
1.3.2
RoverMR-2:sidemenu rover$ npm --version
1.4.28
RoverMR-2:sidemenu rover$ node --version
v0.10.34
RoverMR-2:sidemenu rover$ cordova --version
4.1.2

[rept]

Got the same message.

Strange thing is, this is my flow: X => Y => Z

When I go from X => Y I'm not getting this.
When I go from X => Y => Z and then press back then I get this message on the Y view.

[Strutsagget]

Me too, also using cache: false in routes

[flinn]

Same, using "$ionicConfigProvider.views.maxCache(0);".

[rept]

Same here, also using "$ionicConfigProvider.views.maxCache(0);"

[adamdbradley]

I'm unable to replicate this problem. Would someone be able to put together a simple codepen (using the nightly build) that throws this error? Thanks

[matheusrocha89]

Sure. I think I can @adamdbradley

[matheusrocha89]

@adamdbradley I try to simulate on codepen but not happening, I think it's because there I can't create different HTML files (just one) and my views are all using ng-template there. Do you think that I can record my screen with my app could help?

[matheusrocha89]

@adamdbradley I discover something interesting now. This just happen when the ionic serve "simulates" the iOS version of the app, when I use ionic serve --lab and try to simulate the error on Android view the error doesn't happens, but on iOS side happens.

[adamdbradley]

Yeah the back button text only updates with the previous page title for iOS. Actually the animation code for the nav bar and views use different method between iOS and Android. I'll do an update quick so it's checking for the existence of the previous header bar controller for iOS. Would you still be able to put together a simple codepen showing how it breaks? Thanks

[matheusrocha89]

@adamdbradley I tried to simulate the bug on codepen but didn't work so I created a video showing the error happening. http://monosnap.com/file/rrEb1gfdPf8jXEm9uPY8B7VN1Qll1q

[adamdbradley]

Cool thanks for the video. If you pull down the nightly build do you still see the error? Thanks

[matheusrocha89]

I will try and tell you. I will update to nightly

[matheusrocha89]

No, on nightly the error didn't happen 👍 Thank @adamdbradley 😄

[Strutsagget]

Can confirm its fixed in nightly. 👍

[adamdbradley]

woot! thanks for the help!

[matheusrocha89]

Thank you @adamdbradley 👍 👍 😄