Aurelia doesn't 'refresh' vm when navigating - javascript

Jolly good evening! In my Aurelia-App I'm using a viewModel to deal with various views via an navigationStrategy (reading out route-parameters and setting the view accordingly).
Navigation works baiscally well, there is one problem however:
When I keep navigating between routes that are based on the same viewModel, the viewModel doesn't 'refresh'. Only when navigating to a different route with a different viewModel first, and then back to the intended route, the contents are shown as expected.
It seems like the lifecycle-hooks of the component are not kicking in. Is there any way to trigger unbind() and detached() manually? Or is there a better way to do things generally?
Also the Route-Configuration seems a bit weird. When I'm taking away moduleId the app crashes, and when I'm taking away layoutViewModel the Data is not bound to the view. My Workaround for now is to assign an empty viewModel + an empty template. Am I using this wrong?
Big thanks!
configureRouter(config, Router) {
var getModelStrat = (instruction) => {
instruction.config.layoutView = "pages/templates/"+instruction.params.model+".html"
}
config.addAuthorizeStep(AuthorizeStep);
config.title = 'Aurelia';
config.map([
{
route: 'detail/:model/:id?',
name: 'detail',
moduleId: 'pages/empty',
layoutViewModel: 'pages/detail',
auth: true,
navigationStrategy: getModelStrat
},
{...}
]);
}

This is by design. Router will try to reuse existing view models.
If you need to override this per view model, then create determineActivationStrategy() method on it and return activationStrategy.replace:
import { activationStrategy } from 'aurelia-router';
export class SomeViewModel {
// ...
determineActivationStrategy() {
return activationStrategy.replace;
}
// ...
}
If you need to override this for each view model / route then take a look at Marton Sagi's answer for a similar question. Basically, all of your routes need to define activationStrategy: 'replace'.

Related

Observing a property on a service from a route in EmberJS

I think I'm not understanding a concept here. As far as I know any Ember.object can observe properties on another Ember.object.
So, I have a service, a router, and a component. I need the component and the router to be able to observe a property on the service. It's entirely possible that I'm just structuring the solution in the wrong way, I'll include an overview of what I'm trying to do at the end.
Here is approximately what I have:
/services/thing-manager.js
export default Ember.Service.extend({
observedProperty: 'original value'
});
/components/thing-shower.js
export default Ember.Component.extend({
thingManager: Ember.inject.service(),
myObserver: Ember.observer(
'thingManager.observedProperty',
function() {
// This shows up as anticipated, unlike the one in the routes
console.log('THING SHOWER COMPONENT observed change on thingManager')
}
),
actions: {
changeObservedProperty: function() {
let thingManager = this.get('thingManager')
let newText = thingManager.get('observedProperty') + '!'
// here i am sure to call `set` to make sure observers fire
thingManager.set('observedProperty', newText)
}
}
});
/routes/things.js
export default Ember.Route.extend({
thingManager: Ember.inject.service(),
underObservation: Ember.observer('thingManager.observedProperty', function() {
// This is what I expect to fire, but does not.
console.log('THINGS ROUTE observed change on thingManager')
}),
});
As you can see, I'm expecting console output from both observers in the component and router. Why doesn't this work?
Twiddle here!
My Overall Goals
This is perhaps a separate question, but I'd like to know if there is a better way to accomplish what I'm trying to do. I've been learning about 'data down, actions up', which led me to this approach. I'm building a website that load a json file with a bunch of GPS coordinates and sticks them on a map.
The goal is to click a map marker, and have that load the corresponding data. This should also change the route. So, my thinking was, to keep track of my markers in a service, and when the selected marker changes, the router would observe that and transition to the next route. The component would also notice the changed property and update the map.
Thanks folks!
In things.js route file you haven't used accessed/used thing-manager service, so observer will not be triggered.
routes/thing.js
init(){
this._super(...arguments);
this.get('thingManager');
},
introducing this will make your observer to be fired.
I would say, if you are following the DDAU priniciple, then your component should not mutate the thing-manager service properties. it should send action to service and mutate it.
Note: You can have observers and computed properties inside any Ember.Object which means you have it thing-manager service too.

Access a route model from non nested route with Ember js

I am wondering the appropriate way to access a route model from a different non nested route controller.
If I have my routes set up like this: (this works however, not sure if its proper)
App.Router.map(function() {
this.route('admin');
this.route('page1');
}
And the Page 1 route has a model like this:
App.page1Model = {content:'Content of simple model'};
App.Page1Route = Ember.Route.extend({
model(){
return App.page1Model;
});
Then the admin controller wants to access the page1 route, I can only do it like this:
App.AdminController = Ember.Controller.extend({
page1Model:App.page1Model,
Now do stuff with page1Model.....
});
Ive tried to use Ember.inject.controller() however that only works for me when my routes are nested and I want to access Parent controller from child. Is there a way to use that syntax to get what I want, or is there a better way than what im doing?
Thanks
There's an inherent problem with what you're asking for: when the user is on the admin page, they're not on the page1 page, so there's no page1 context. Some questions you might want to ask:
what happens if the user goes to /admin having never gone to /page1?
what happens if the user goes to /page1 then /page2 then /admin?
I can think of two Ember-esque ways of doing what you want:
A Page1ModelService. Here, you create an Ember.Service that holds an instance of Page1Model. You inject the service into route:page1 and route:admin and let them each pull off the instance. Whether they can change which instance of the model is showing is up to you.
Return a Page1Model instance in the model hook for route:application. This route sits above both route:page1 and route:admin, so they can both look up the model as follows:
// route:application
model() {
return App.Page1Model.create();
}
// route:page1
model() {
return this.modelFor('application');
}
I was able to achieve my goal through using registers and injection. Can someone please take a look and let me know if this is 'proper' through Ember standards or if there is a better way ( #James A. Rosen :) )?
OH! If there is a better way to attach the model to the page1 route, please let me know. This worked though I am not sure if i like the .model after create().
JSBIN: http://jsbin.com/tikezoyube/1/edit?html,js,output
JS of that:
var App = Ember.Application.create();
var page1Model = {title:'Old Title'};
var page1ModelFactory = Ember.Object.extend({
model : page1Model
});
App.Router.map(function(){
this.route('page1');
this.route('admin');
});
App.register('model:page1', page1ModelFactory);
App.inject('controller:admin','page1Model','model:page1');
App.Page1Route = Ember.Route.extend({
model(){ return page1ModelFactory.create().model; }
});
App.AdminController = Ember.Controller.extend({
actions:{
updateTitle:function(){
console.log(this.get('page1Model').model.title);
this.get('page1Model').set('model.title','THE NEW TITLE!');
console.log(this.get('page1Model').model.title);
this.transitionToRoute('page1');
}
}
});
Thanks!

Ember.js - Access query parameters in route dynamically

I am accessing the query parameters in the route using the below code:
export default Ember.Route.extend({
afterModel: function(params, transition){
this.set('clientId', transition.queryParams.clientId);
},
setupController: function(controller) {
controller.set('clientId', this.get('clientId'));
}
});
The reason I am not using a controller is because I am feeding this data straight in to a component and I am of the understanding that in newer versions of Ember controllers will be phased out.
This is currently working however if I change any of the properties in the URL it doesn't update in the app unless I refresh the page or exit the route and re-enter it.
How can I "re-run" the route afterModel and update the properties which are passed to the component?
If the only option is to use a controller then I can implement this until a better solution comes along.
Try adding this to your route:
queryParams: {
'clientId' : {
refreshModel: true,
replace : true,
},
}
See here for more information.

insert component without calling handlebars helper or a controller with outlet

I want to insert a component into controller template without using the handlebars helper (component "component-name"... or component-name). Or through a controller in an outlet (or as long as the solution works for a component that wants to insert another component, then it's fine, I don't think outlets work in components).
In other words:
App.IndexController = Ember.Controller.extend({
actions: {
insertComponent: function() {
var component = this.container.lookup("component:my-inserted", { singleton: false });
component.set("layoutName", "components/my-inserted");
// to be like handlebars-inserted component, what do i do here?
}
}
});
You can use test with this: http://emberjs.jsbin.com/popozanare/4/edit?html,js,output
Why?
Thinking of a way of to have clean modal syntax, such as the "openModal" syntax described in the Ember Cookbook: http://guides.emberjs.com/v1.10.0/cookbook/user_interface_and_interaction/using_modal_dialogs/.
The problem is that the source context is lost, as the modal is within the ApplicationRoute. I want the same syntax when calling a modal, but keeping the hierarchy. You can keep the hierarchy using https://github.com/yapplabs/ember-modal-dialog, which requires a mapping of variables... which i don't like either (but will likely implement if I have no other choice).
TD;LR: Want to open modal within the controller/component (context) that called it without scaffolding in the controller/component that called it (mapping variables, etc).
Edit:
On second thought, using a container view might be cleaner than mapping variables, found in this solution: http://jsbin.com/hahohi/1/edit?html,js,output. Still needs scaffolding though. Thanks #user3568719.
That cookbook is a bit outdated, but if you are looking for a "clean" way to handling modals in your app I would suggest named outlets.
Add it to your application or auth template {{outlet "modal"}} and when you want to bring up the modal you can catch the action on the corresponding route and then render into that named outlet like so:
this.render('your-desired-modal-template', {
into: 'auth',
outlet: 'modal'
});
And when you want to dismiss it simply disconnectOutlet like so:
this.disconnectOutlet({
outlet: 'modal',
parentView: 'auth'
});
This is the way we've been going about it, I m open to suggestions/better methods.

EmberJS: How to transition to a router from a controller's action

I have an action:
{{action create target="controller"}}
which I have targeted to the bound controller (rather than the router) like this:
App.AddBoardController = Ember.Controller.extend
create: ->
App.store.createRecord App.Board, {title: #get "boardName"}
App.store.commit()
//TODO: Redirect to route
How do I redirect back to a route from the controller action?
Use transitionToRoute('route') to redirect inside an Ember controller action:
App.AddBoardController = Ember.Controller.extend({
create: function(){
...
//TODO: Redirect to route
this.transitionToRoute('route_name');
}
...
In fact, this is not Ember idiomatic. From what I know, and what I have learnt from Tom Dale himself, here are some remarks about that code:
First, you should not transitionTo from elsewhere than inside the router: by doing so, you are exposing yourself to serious issues as you don't know in which state is the router, so to keep stuff running, you will quickly have to degrade your design, and by the way the overall quality of you code, and finally the stability of your app,
Second, the action content you are showing should be located inside the router to avoid undesired context execution. The router is indeed a way to enforce a coherent behavior for the whole app, with actions being processed only in certain states. While you are putting the actions implementation into Controllers, those actions can be called at anytime, any including wrong...
Finally, Ember's controllers are not aimed to contain behavior as they rather are value-added wrappers, holding mainly computed properties. If you nevertheless want to factorize primitives, maybe the model can be a good place, or a third party context, but certainly not the Controller.
You should definitely put the action inside the router, and transitionTo accordingly.
Hope this will help.
UPDATE
First example (close to your sample)
In the appropriated route:
saveAndReturnSomewhere: function (router, event) {
var store = router.get('store'),
boardName = event.context; // you pass the (data|data container) here. In the view: {{action saveAndReturnSomewhere context="..."}}
store.createRecord(App.Board, {
title: boardName
});
store.commit();
router.transitionTo('somewhere');
}
Refactored example
I would recommend having the following routes:
show: displays an existing item,
edit: proposes to input item's fields
Into the enclosing route, following event handlers:
createItem: create a new record and transitionTo edit route, e.g
editItem: transitionTo edit route
Into the edit route, following event handlers:
saveItem: which will commit store and transitionTo show route, e.g
EDIT: Keep reading, Mike's answer discusses some of the problems with this approach.
You can just call transitionTo directly on the router. If you are using defaults this looks like App.router.transitionTo('route', context).

Categories

Resources