Develop Reference

Ember Understand execution flow between route/controller

I have a "box" route/controller as below;
export default Ember.Controller.extend({
initialized: false,
type: 'P',
status: 'done',
layouts: null,
toggleFltr: null,
gridVals: Ember.computed.alias('model.gridParas'),
gridParas: Ember.computed('myServerPars', function() {
this.set('gridVals.serverParas', this.get('myServerPars'));
this.filterCols();
if (!this.get('initialized')) {
this.toggleProperty('initialized');
} else {
Ember.run.scheduleOnce('afterRender', this, this.refreshBox);
}
return this.get('gridVals');
}),
filterCols: function()
{
this.set('gridVals.layout', this.get('layouts')[this.get('type')]);
},
myServerPars: function() {
// Code to set serverParas
return serverParas;
}.property('type', 'status', 'toggleFltr'),
refreshBox: function(){
// Code to trigger refresh grid
}
});
My route looks like;
export default Ember.Route.extend({
selectedRows: '',
selectedCount: 0,
rawResponse: {},
model: function() {
var compObj = {};
compObj.gridParas = this.get('gridParas');
return compObj;
},
activate: function() {
var self = this;
self.layouts = {};
var someData = {attr1:"I"};
var promise = this.doPost(someData, '/myService1', false); // Sync request (Is there some way I can make this work using "async")
promise.then(function(response) {
// Code to use response & set self.layouts
self.controllerFor(self.routeName).set('layouts', self.layouts);
});
},
gridParas: function() {
var self = this;
var returnObj = {};
returnObj.url = '/myService2';
returnObj.beforeLoadComplete = function(records) {
// Code to use response & set records
return records;
};
return returnObj;
}.property(),
actions: {
}
});
My template looks like
{{my-grid params=this.gridParas elementId='myGrid'}}
My doPost method looks like below;
doPost: function(postData, requestUrl, isAsync){
requestUrl = this.getURL(requestUrl);
isAsync = (isAsync == undefined) ? true : isAsync;
var promise = new Ember.RSVP.Promise(function(resolve, reject) {
return $.ajax({
// settings
}).success(resolve).error(reject);
});
return promise;
}
Given the above setup, I wanted to understand the flow/sequence of execution (i.e. for the different hooks).
I was trying to debug and it kept hopping from one class to another.
Also, 2 specific questions;
I was expecting the "activate" hook to be fired initially, but found out that is not the case. It first executes the "gridParas" hook
i.e. before the "activate" hook. Is it because of "gridParas"
specified in the template ?
When I do this.doPost() for /myService1, it has to be a "sync" request, else the flow of execution changes and I get an error.
Actually I want the code inside filterCols() controller i.e.
this.set('gridVals.layout', this.get('layouts')[this.get('type')]) to
be executed only after the response has been received from
/myService1. However, as of now, I have to use a "sync" request to do
that, otherwise with "async", the execution moves to filterCols() and
since I do not have the response yet, it throws an error.
Just to add, I am using Ember v 2.0

activate() on the route is triggered after the beforeModel, model and afterModel hooks... because those 3 hooks are considered the "validation phase" (which determines if the route will resolve at all). To be clear, this route hook has nothing to do with using gridParas in your template... it has everything to do with callling get('gridParas') within your model hook.
It is not clear to me where doPost() is connected to the rest of your code... however because it is returning a promise object you can tack on a then() which will allow you to essentially wait for the promise response and then use it in the rest of your code.
Simple Example:
this.doPost().then((theResponse) => {
this.doSomethingWith(theResponse);
});
If you can simplify your question to be more clear and concise, i may be able to provide more info

Generally at this level you should explain what you want to archive, and not just ask how it works, because I think you fight a lot against the framework!
But I take this out of your comment.
First, you don't need your doPost method! jQuerys $.ajax returns a thenable, that can be resolved to a Promise with Ember.RSVP.resolve!
Next: If you want to fetch data before actually rendering anything you should do this in the model hook!
I'm not sure if you want to fetch /service1, and then with the response you build a request to /service2, or if you can fetch both services independently and then show your data (your grid?) with the data of both services. So here are both ways:
If you can fetch both services independently do this in your routes model hook:
return Ember.RSVP.hash({
service1: Ember.RSVP.resolve($.ajax(/*your request to /service1 with all data and params, may use query-params!*/).then(data => {
return data; // extract the data you need, may transform the response, etc.
},
service2: Ember.RSVP.resolve($.ajax(/*your request to /service2 with all data and params, may use query-params!*/).then(data => {
return data; // extract the data you need, may transform the response, etc.
},
});
If you need the response of /service1 to fetch /service2 just do this in your model hook:
return Ember.RSVP.resolve($.ajax(/*/service1*/)).then(service1 => {
return Ember.RSVP.resolve($.ajax(/*/service2*/)).then(service2 => {
return {
service1,
service2
}; // this object will then be available as `model` on your controller
});
});
If this does not help you (and I really think this should fix your problems) please describe your Problem.

Why are these records not stored in cache?

I would like to cache my records once they are received, but I can't figure out how. According to the Documentation you can just call this.store.push('model', record), but it doesn't seem to work. Ember requests the data from the server with each call of the route, I would like to do this only once and use the local store after it is fetched from the server.
If I try to debug it as suggested by the Documentation, i get that there is no cache:
Pd.__container__.lookup('store:main').recordCache
// --> undefined
This is my route (where I try to cache it):
Pd.ProductsRoute = Ember.Route.extend({
model: function () {
var promise = this.store.find('product');
var that = this;
promise.then(function(value) {
// Caching supposed to happen here
value.content.forEach(function(product){
that.store.push('product', product);
});
}, function(reason) {
// on rejection
});
return promise;
}
});
And this the according Adapter (seems to work fine):
Pd.ProductAdapter = DS.RESTAdapter.extend({
primaryKey: 'nid', // DOES NOT WORK BUT I CAN LIVE WITH THAT (SEE WORKAROUND)
findAll: function(store, type) {
var url = 'ws/rest/products';
return new Ember.RSVP.Promise(function(resolve, reject) {
jQuery.getJSON(url).then(function(data) {
Ember.Logger.debug("Received Products:"); // TRIGGERS EVERY TIME!
var srcPattern = /src=["']([^'"]+)/;
data.forEach(function(product){
product.id = product.nid;
product.field_image = srcPattern.exec(product.field_image)[1];
});
Ember.Logger.debug(data);
Ember.run(null, resolve, {product: data});
}, function(jqXHR) {
jqXHR.then = null; // tame jQuery's ill mannered promises
Ember.run(null, reject, jqXHR);
});
});
}
});

this.store.find('type') will always make a call to the server for records. If you only want to make a call to the server once do it in the ApplicationRoute and then instead of using find use the all filter inside of the route that's hit multiple times.
Pd.ApplicationRoute = Em.Route.extend({
model: function(params){
return Em.RSVP.hash({
product: this.store.find('product'),
somethingElse: otherPromise
})
}
});
Pd.ProductRoute = Em.Route.extend({
model: function(params){
return this.store.all('product');
}
});
If you just want to prep the store with your products, you don't even need to return it, or use it in the app route
Pd.ApplicationRoute = Em.Route.extend({
model: function(params){
this.store.find('product');
return {foo:'bar'}; // or return nothing, it doesn't matter
}
});
Lazy loading the models
App.ProductRoute = Ember.Route.extend({
hasPreLoaded: false,
model: function() {
if(this.get('hasPreLoaded')){
return this.store.all('product');
} else {
this.toggleProperty('hasPreLoaded');
return this.store.find('product');
}
}
});
Example
http://emberjs.jsbin.com/OxIDiVU/482/edit
You don't define the primary key on the adapter, it goes on the serializer
Pd.ProductSerializer = DS.RESTSerializer.extend({
primaryKey: 'nid'
});
The cache no longer lives there, it lives in this.store.typeMapFor(Pd.Product) or this.store.typeMaps.
The site is still referencing an older version of ember data until ember data 1.0 is released, I'll assume you're using 1.0 beta version. This document is more up to date https://github.com/emberjs/data/blob/master/TRANSITION.md

What is the best way to add server variables (PHP) in to the Backbone.model using require.js?

I'm not sure what is the elegant way to pass server variables in to my Model.
For example, i have an id of user that has to be implemented on my Model. But seems like Backbone with require are not able to do that.
My two options are:
Get a json file with Ajax.
Add the variable on my index.php as a global.
Someone know if exists a other way. Native on the clases?
Trying to make work the example of backbonetutorials. I am not able to throw a callback when the method fetch().
$(document).ready(function() {
var Timer = Backbone.Model.extend({
urlRoot : 'timeserver/',
defaults: {
name: '',
email: ''
}
});
var timer = new Timer({id:1});
timer.fetch({
success: function(data) {
alert('success')
},
fail: function(model, response) {
alert('fail');
},
sync: function(data) {
alert('sync')
}
});
});
The ajax request it has been threw. But does not work at all. Because any alert its dispatched.

var UserModel = Backbone.Model.extend({
urlRoot: '/user',
defaults: {
name: '',
email: ''
}
});
// Here we have set the `id` of the model
var user = new Usermodel({id: 1});
// The fetch below will perform GET /user/1
// The server should return the id, name and email from the database
user.fetch({
success: function (user) {
console.log(user);
}
})
The server will reply with a json object then you can leave the rendering part for your backbone. Based on a template for the user.
You may also want to check these out: http://backbonetutorials.com/

ember.js Uncaught TypeError: Object data-size has no method 'transitionTo'

I am very new to ember and trying to implement authentication via facebook
I am using ember-facebook.js library to connect with facebook. Once the authentication is successful, I want to transition to some other route e.g. '/index'. This library creates a App.FBUser object in mixin which is populated from the facebook response. The blog say following:
Whenever the user changes (login, logout, app authorization, etc) the method updateFBUser is called, updating the App.FBUser object on your application. You can do whatever you want with this binding, observe it, put it in the DOM, whatever.
Ember.Facebook = Ember.Mixin.create({
FBUser: void 0,
appId: void 0,
fetchPicture: true,
init: function() {
this._super();
return window.FBApp = this;
},
appIdChanged: (function() {
var _this = this;
this.removeObserver('appId');
window.fbAsyncInit = function() {
return _this.fbAsyncInit();
};
return $(function() {
var js;
js = document.createElement('script');
$(js).attr({
id: 'facebook-jssdk',
async: true,
src: "//connect.facebook.net/en_US/all.js"
});
return $('head').append(js);
});
}).observes('appId'),
fbAsyncInit: function() {
var _this = this;
FB.init({
appId: this.get('appId'),
status: true,
cookie: true,
xfbml: true
});
this.set('FBloading', true);
FB.Event.subscribe('auth.authResponseChange', function(response) {
return _this.updateFBUser(response);
});
return FB.getLoginStatus(function(response) {
return _this.updateFBUser(response);
});
},
updateFBUser: function(response) {
console.log("Facebook.updateFBUser: Start");
var _this = this;
if (response.status === 'connected') {
//console.log(_this);
return FB.api('/me', function(user) {
var FBUser;
FBUser = user;
FBUser.accessToken = response.authResponse.accessToken;
if (_this.get('fetchPicture')) {
return FB.api('/me/picture', function(path) {
FBUser.picture = path;
_this.set('FBUser', FBUser);
return _this.set('FBloading', false);
});
} else {
_this.set('FBUser', FBUser);
return _this.set('FBloading', false);
}
});
} else {
this.set('FBUser', false);
return this.set('FBloading', false);
}
}//updateFBUser
});
Update :
Adding following observer in my LoginController, I am able to capture the App.FBUser update event(it is update after getting response from FB; as indicated by the blog).
From this observer method, when I try to 'transitionTo' my index route I get following error
Uncaught TypeError: Object data-size has no method 'transitionTo'. Following is the code
App.LoginController = Ember.Controller.extend({
onSuccess: (function(){
var self = this;
/*
//tried all these method to redirect but error is the same
var attemptedTransition = this.get('attemptedTransition');
attemptedTransition.retry();
*/
/*
//tried all these method to redirect but error is the same
var router = this.get('target.router');
router.transitionTo('index');
*/
//tried all these method to redirect but error is the same
this.transitionToRoute('index');
}).observes('App.FBUser')
});
Index Route
App.AuthenticatedRoute = Ember.Route.extend({
beforeModel: function(transition){
var self = this;
if(!App.FBUser){
self.redirectToLogin(transition);
}
},
redirectToLogin: function(transition){
var loginController = this.controllerFor('login');
loginController.set('attemptedTransition', transition);
this.transitionTo('login');
}
});
I am not able to get my head around it.
Any help is greatly appreciated. Thanks

How can I access this object in my Route.beforeModel() hook.
Depending on what route's beforModel hook you are talking about, this is how you could do it:
App.SomeRoute = Ember.Route.extend({
beforeModel: function(transition) {
if (!Ember.isNone(App.FBUser)) {
// calling 'transitionTo' aborts the transition, redirects to 'index'
this.transitionTo('index');
}
}
});
Update in response to your last comment
The addon you are using is slightly outdated and the proposed implementation method for the mixin in your application will not work with the current version of ember:
App = Ember.Application.create(Ember.Facebook)
App.set('appId', 'yourfacebookappid');
starting from version 1.0.0-rc3 of ember you should rather do it like this:
App = Ember.Application.creatWithMixins(Ember.Facebook);
App.set('appId', 'yourfacebookappid');
After that you should be able to have access to the App.FBUser object as mentioned above.
Update 2
If you want to be able to be notified when some events happend, like login, logout etc. you should (as the Author of the addon states on it's blog post) override the updateFBUser method and do in there your transitions.
Since the addon is trough the mixin available in our App namespace you should be able to do the following:
App = Ember.Application.creatWithMixins(Ember.Facebook, {
updateFBUser: function() {
this._super();
// we are calling super to let the addon
// do it's work but at the same time we get
// notified that something happened, so do at this
// point your transition
}
});
Hope it helps.

As per Issue 1 adding
attributeBindings: [],
to:
return Ember.FacebookView = Ember.View.extend({
solved the issue.

Backbone.js and local storage . A "url" property or function must be specified

I'm improving my knowledge about Backbone.js and have this code sample taken from a tutorial. (http://bardevblog.wordpress.com/2012/01/16/understanding-backbone-js-simple-example/)
This example will not access the server for now, so to simulate the retrieval of data from the server I have a file name movies.json.
What I am trying to do:
Add json data in local storage (using localStorage adapter)
For this I am using Backbone.ajaxSync, Which Is Given to the alias Backbone.sync by the localStorage adapter: I created the method refreshFromServer () to do this
The reason for doing this is that I'm trying to implement a way to get data only one time (and only refresh when i need to)
My issues:
  I'm having an error "Uncaught Error: 'url' property or function must be specified" when I call refreshFromServer ().
I do not understand why because I set the url collection. (url : "scripts/data/movies.json" )
Sample code
var Theater = {
Models : {},
Collections : {},
Views : {},
Templates : {}
}
Theater.Models.Movie = Backbone.Model.extend({})
Theater.Collections.Movies = Backbone.Collection.extend({
model : Theater.Models.Movie,
localStorage : new Backbone.LocalStorage("MovieStore"), // Unique name within your app.
url : "scripts/data/movies.json",
refreshFromServer : function() {
return Backbone.ajaxSync.apply(this, arguments);
},
initialize : function() {
console.log("Movies initialize")
}
});
Theater.Templates.movies = _.template($("#tmplt-Movies").html())
Theater.Views.Movies = Backbone.View.extend({
el : $("#mainContainer"),
template : Theater.Templates.movies,
initialize : function() {
this.collection.bind("reset", this.render, this);
},
render : function() {
console.log("render")
console.log(this.collection.length);
}
})
Theater.Router = Backbone.Router.extend({
routes : {
"" : "defaultRoute"
},
defaultRoute : function() {
console.log("defaultRoute");
Theater.movies = new Theater.Collections.Movies()
new Theater.Views.Movies({
collection : Theater.movies
});
Theater.movies.refreshFromServer();
//Theater.movies.fetch();
console.log(Theater.movies.length)
}
})
var appRouter = new Theater.Router();
Backbone.history.start();
Notes:
If a comment localStorage property in the collection
Theater.Models.Movie = Backbone.Model.extend({})
Theater.Collections.Movies = Backbone.Collection.extend({
model : Theater.Models.Movie,
//localStorage : new Backbone.LocalStorage("MovieStore")
...
});
and then in router call normal fetch method
Theater.Router = Backbone.Router.extend({
routes : {
"" : "defaultRoute"
},
defaultRoute : function() {
Theater.movies = new Theater.Collections.Movies()
new Theater.Views.Movies({
collection : Theater.movies
});
//Theater.movies.refreshFromServer();
Theater.movies.fetch();
}
})
I can see the json list correctly in my view
If I use the localStorage property in the collection and then call the standard fetch () method, I see only an empty list (I think it is normal as it is read from the local storage and is empty)
The error only occurs when using the method refreshFromServer () witch use Backbone.ajaxSync (alias for backbone.sync)

Err... my bad. The refreshFromServer implementation is from my answer to your earlier question., and it's completely, uselessly wrong.
Backbone.sync expects arguments (method, model, options), but as it stands, it doesn't get what it needs from refreshFromServer because the refresh method simply sends forward whatever arguments it gets. Sorry for the mistake.
The correct, working implementation would be:
refreshFromServer : function(options) {
return Backbone.ajaxSync('read', this, options);
}
It can be used either via success / error callbacks passed to the options hash:
this.collection.refreshFromServer({ success: function() { /* refreshed... */ });
Or via the jqXHR Promise API:
this.collection.refreshFromServer().done(function() { /* refreshed... */ })
Or not signing up for callbacks and waiting for the collection reset event like in your example:
this.collection.bind("reset", this.render, this);
this.collection.refreshFromServer();
This should work. Please let me know if it doesn't. I fixed my answer in the previous question too, in case someone stumbles onto it.
Edit: To save the data to local storage after refreshing you need to manually save each of the models:
var collection = this.collection;
collection.refreshFromServer({success: function(freshData) {
collection.reset(freshData);
collection.each(function(model) {
model.save();
});
}});