It seems to be very very simple. But I can't do it.
I just want to get a value of my Firebase DB in my controller.
The Firebase Database is like this:
users {
30549545 {
name: "Marcelo"
lastName: "Forclaz"
years: 24
}
}
In my controller I wrote the following code:
app.controller('usersCtrl', function($scope, $firebaseArray) {
var ref = firebase.database().ref('users');
$scope.userdata = $firebaseArray(ref);
});
In the ngRepeat of the HTML code the iteration works fine. But I need to get the "years" value in my controller to use it to another command, ¿How can I do it? I've tried of several deferents ways but I didn't get the wished result. I realized that retrieving data from Firebase width AngularJS is not so easy than make it width simple and pure JavaScript.
You have to wait until userdata loaded:
app.controller('usersCtrl', function($scope, $firebaseArray) {
var ref = firebase.database().ref('users');
$scope.userdata = $firebaseArray(ref);
$scope.userdata.$loaded()
.then(function(){
console.log($scope.userdata);
});
});
Finally, I've got it!
$scope.userdata.$ref().once('value', function(snap) {
angular.forEach(snap.val(), function(index)) {
console.log(index.years)
}
}
Related
I have an angular app that supposed to work with json-server for retrieving data and adding new data (users feedback). so I have json database with some arrays and one of them is "feedbacks":[] which is currently empty. on PUT method I get:
PUT /feedbacks 404 from server and this is chrome console PUT http://localhost:3000/feedbacks 404 (Not Found).
this is my service:
angular.module('myApp')
.constant("baseURL", "http://localhost:3000/")
.service('feedbackService',['$resource','baseURL',function($resource,baseURL){
this.getFeedback=function(){
return $resource(baseURL+"feedbacks/:date",null,{
'update':{
method:'PUT'
}
});
};
}]);
this is the controller:
// contactus.html controllers
.controller('ContactController', ['$scope', function($scope) {
$scope.feedback = {firstName: "",lastName: "",email: "",date: ""};
}])
// Feedback form controller
.controller('FeedbackController', ['$scope', 'feedbackService', function($scope, feedbackService) {
$scope.feedbacks = feedbackService.getFeedback().query(function(response) {
$scope.feedbacks = response;
});
$scope.sendFeedback = function() {
$scope.feedback.date = new Date().toISOString();
$scope.feedbacks.push($scope.feedback);
feedbackService.getFeedback().update($scope.feedbacks);
$scope.feedbackForm.$setPristine();
$scope.feedback = {firstName: "",lastName: "",email: "", date:""};
};
}])
getFeedbacks() method works and server send 200, but for PUT I receive 404.
OK I solved it :)) a very silly mistake. there was no need for push and then update as I wanted to create new object inside the array.
$scope.feedback.date = new Date().toISOString();
feedbackService.getFeedback().save($scope.feedback);
and also I changed the service to:
return $resource(baseURL+"feedbacks/:id",null,{
to have auto incremental id for each object
I am working on displaying collection that I got from DB in angular with firebase DB. I have those controller and service setup. in the html, I use search.users expecting it will hold all the data that I got from the DB but it won't show up. I can't figure out why. I tried few things like angular.copy or $broadcast with no luck. Can anyone help advise on this? Appreciated in advance.
.controller('SearchController', function ($scope, SearchService, logout, $location){
var search = this;
search.users = SearchService.users;
//$scope.$on('evtputUsers', function () {
// search.users = SearchService.users;
//});
})
//service for SearchService
.factory('SearchService', function ($http, $rootScope){
var userRef = new Firebase("app url");
var broadcastUsers = function () {
$rootScope.$broadcast('evtputUsers');
};
//get the user info
//insert the data to the db.
//retrieving the data
var dbUsers;
userRef.child('users').on('value', function(snapshot){
dbUsers = snapshot.val();
// angular.copy(snapshot.val(), dbUsers);
console.log('usersinDB:',dbUsers);
broadcastUsers();
}, function(err){
console.error('an error occured>>>', err);
});
return {
users: dbUsers
};
})
Rather than using $broadcast() and $on() you should use the AngularFire module.
AngularFire provides you with a set of bindings to synchronizing data in Angular.
angular.module('app', ['firebase']) // 1
.controller('SearchCtrl', SearchCtrl);
function SearchCtrl($scope, $firebaseArray) {
var userRef = new Firebase("app url")
$scope.users = $firebaseArray(userRef); // 2
console.log($scope.users.length); // 3
}
There are three important things to take note of:
You need to include AngularFire as firebase in the dependency array.
The $firebaseArray() function will automagically synchronize your user ref data into an array. When the array is updated remotely it will trigger the $digest() loop for you and keep the page refreshed.
This array is asynchronous. It won't log anything until data has populated it. So if you're logs don't show anything initially, this is because the data is still downloading over the network.
I'm currently learning AngularJS and similar stuff, and today I've encountered a problem (probably with async).
What I'm trying to do, is to use an Angular factory to get some data from Firebase and then use the data in a controller.
App.factory('Jobs', ['$firebaseObject', function($firebaseObject) {
var ref = new Firebase('https://myapp.firebaseio.com/Jobs');
return $firebaseObject(ref);
}]);
App.controller('JobsController', ['$scope', 'Jobs', function($scope, Jobs) {
Jobs.$bindTo($scope, 'allJobs');
console.log($scope.allJobs);
}]);
This is working pretty OK. When I put {{ allJobs | json }} in a template- it is updated after few seconds. The problem is that in the controller $scope.allJobs is returning undefined (probably because the response from Firebase arrived later than the code has been executed.
My question is, how to write it, so I can access $scope.allJobs directly in the controller?
You could do something like this:
App.factory('Jobs', ["$firebaseObject",
function($firebaseObject) {
// create a reference to the Firebase where we will store our data
return function(url){
var ref = new Firebase(url);
// this uses AngularFire to create the synchronized array
return $firebaseObject(ref);
};
}
]);
Then in your controller:
App.controller('JobsController', ['$scope', 'Jobs', function($scope, Jobs) {
$scope.allJobs = Jobs('https://myapp.firebaseio.com/Jobs');
$scope.allJobs.$loaded().then();
}]);
This is showing the $loaded method as opposed to $bindTo. As the other answers/comments mention, $bindTo may be the better way to go.
Referencing to this Firebase documentation: https://www.firebase.com/docs/web/libraries/angular/api.html#angularfire-firebaseobject-bindtoscope-varname
I can just do it very very simple:
App.controller('JobsController', ['$scope', 'Jobs', function($scope, Jobs) {
Jobs.$bindTo($scope, 'allJobs').then(function() {
// now I have access to $scope.allJobs when everything is downloaded from Firebase
});
}]);
I have trouble fetching one unique item from my firebase using angularfire 1.0.0. To clarify, I want my app to fetch a post given a unique firebase id e.g. "-JkZwz-tyYoRLoRqlI_I". It works when navigating in the app e.g. clicking on a link to a specific post, but not on a refresh. My guess is that it has something to do with synchronization. Right now it works when fetching all posts and use it in a ng-repeat. This is a clue to why it works for one item when navigating to the page. This should probably not be hard since this should be a pretty standard operation, but i can't get it to work. I have searched everywhere but there is actually no guide on this. In the API they refer to $getRecord(key)
Returns the record from the array for the given key. If the key is not
found, returns null. This method utilizes $indexFor(key) to find the
appropriate record.
But this is not working as expected. Or am i missing something?
It works for ng-repeat like this:
<div ng-repeat="postt in posts">
<div>
<h1>{{postt.title}}</h1>
<div>{{postt.timestamp}}</div>
<div>{{postt.content}}</div>
</div>
</div>
But not for unique items like this:
<div>
<h1>{{post.title}}</h1>
<div>{{post.timestamp}}</div>
<div>{{post.content}}</div>
</div>
This is the service:
'use strict';
angular.module('app.module.blog.post')
.factory("PostService", ["$firebaseArray", "FIREBASE_URL", function($firebaseArray, FIREBASE_URL) {
var ref = new Firebase(FIREBASE_URL + "posts");
var posts = $firebaseArray(ref);
return {
all: posts, // ng-repeat on this works fine
last: function(nr) {
var query = ref.orderByChild("timestamp").limitToLast(nr);
return $firebaseArray(query); // ng-repeat on this work fine to
},
create: function (post) {
return posts.$add(post);
},
get: function (postId) {
console.log(postId); // This is -JkZwz-tyYoRLoRqlI_I
var post = posts.$getRecord(postId);
console.log(post); // This print null
return post;
},
delete: function (post) {
return posts.$remove(post);
}
};
}]);
As the comments say in the get function, the postId is there and posts is also set, but the post is null.
This is the controller
'use strict';
angular.module('app.module.blog.post', [])
.controller('PostCtrl', ['$scope', '$routeParams', 'PostService', function($scope, $routeParams, PostService) {
// This returns e.g. postId "-JkZwz-tyYoRLoRqlI_I"
console.log($routeParams.postId);
$scope.post = PostService.get($routeParams.postId);
$scope.posts = PostService.all; // Illustrates the example not actually in this controller otherwise
}]);
This is what is an example on what is in the firebase database
<myfirebase>
posts
-JkUnVsGnCqbAxbMailo
comments
content: ...
timestamp: ...
title: ...
-JkZwz-tyYoRLoRqlI_I
comments
content: ...
timestamp: ...
title: ...
-JkhaEf9tQy06cOF03Ts
content: ...
timestamp: ...
title: ...
I find this problem very wierd since it should be very standard. I am obviously missing something, but can't work it out. Any help is very much appreciated!
Thanks in advance!
I know that the documentation of the $getRecord() function is kind of misleading. What you actually get from $firebaseArray is a promise of an array. It means that your posts variable will contain your posts at some point in the future. That being said, it seems that the $getRecord function only works when the promise have been resolved, i.e. when the array has been downloaded from Firebase. To make sure that the promise is resolved when you call the $getRecord function, you can use $loaded() on the promise :
var posts = $firebaseArray(ref);
posts.$loaded().then(function(x) {
var post = x.$getRecord(postId);
console.log(post);
}).catch(function(error) {
console.log("Error:", error);
});
If you are wondering why it works for ng-repeat, it's because Angular knows that the posts variable is a promise and waits for it to be resolved before rendering the values.
This is happening due to promises.
Along the lines of what Kato, Jean-Philippe said, $firebaseArray is not immediately available as it needs to be downloaded.
See the .$loaded() documentation:
.$loaded() "returns a promise which is resolved when the initial array data has been downloaded from Firebase. The promise resolves to the $firebaseArray itself."
That answers your question, and I just wanted to show another way of doing it:
This is a great use case for extending AngularFire services.
As the AngularFire API Documentation says:
"There are several powerful techniques for transforming the data downloaded and saved by $firebaseArray and $firebaseObject. These techniques should only be attempted by advanced Angular users who know their way around the code."
Putting all that together, you accomplish what you want to do by:
Extending the Firebase service $firebaseArray
Following the documentation for extending services.
Example
Here is a working JSFIDDLE example I put together that is tied to one of my public Firebase instances.
It's important to note that you should add ".indexOn":"timestamp" to your rules for /posts.
Factories
app.factory('PostsArray', function (FBURL, PostsArrayFactory) {
return function (limitToLast) {
if (!limitToLast) {
console.error("Need limitToLast");
return null;
}
var postsRef = new Firebase(FBURL + '/posts').orderByChild('timestamp').limitToLast(limitToLast);
return new PostsArrayFactory(postsRef);
}
});
app.factory('PostsArrayFactory', function ($q, $firebaseArray) {
return $firebaseArray.$extend({
getPost: function (postKey) {
var deferred = $q.defer();
var post = this.$getRecord(postKey);
if (post) {
console.log("Got post", post);
deferred.resolve(post);
} else {
deferred.reject("Post with key:" + postKey + " not found.");
}
return deferred.promise;
},
createPost: function (post) {
var deferred = $q.defer();
post.timestamp = Firebase.ServerValue.TIMESTAMP;
this.$add(post).then(function (ref) {
var id = ref.key();
console.log("added post with id", id, "post:", post);
deferred.resolve(ref);
}).
catch (function (error) {
deferred.reject(error);
});
return deferred.promise;
}
});
});
Controller
app.controller("SampleController", function ($scope, PostsArray) {
var posts = new PostsArray(5);
$scope.posts = posts;
$scope.newPost = {};
$scope.createNewPost = function () {
posts.createPost($scope.newPost);
}
$scope.postId = '';
$scope.getPost = function () {
posts.getPost($scope.postId).then(function (post) {
$scope.gotPost = post;
}).
catch (function (error) {
$scope.gotPost = error;
});
}
});
I'm writting an angularjs app with PouchDB. I can't get updated template after query from db.
I loaded data from XML2JSON, then put them to pouchdb. Here is the deal.
If I use this to fill data to view, every think is OK.
$http.get('Katalog_27_11_2014_21_41_21.xml').then(function(resp) {
console.log(resp);
return resp.data;
}).then(function(string) {
var jsonData = xmlParser.xml_str2json(string);
var outPutJSON = [];
console.log(jsonData);
angular.forEach(jsonData.Catalog.Item, function(value, key) {
Database.put(value.EANs.EAN,value);
outPutJSON.push(value);
console.log(value);
});
$scope.products = outPutJSON;
});
but if I use query from pouchdb the view is empty, I see the data in console nad even in the ng-inspector, but not in the view. I thougth that I have to user $scope.apply() for updating the view and model, but that's what i get TypeError: undefined is not a function {stack: (...), message: "undefined is not a function"}
The in view is empty. I can't figure out where is the bug... :]
Database.queryDocs().then(function(doc) {
var _products = [];
log.debug(doc);
angular.forEach(doc.rows, function(value, key) {
log.debug(value);
_products.push(value.doc.data);
});
$scope.products = _products;
// $scope.apply();
log.debug($scope.products);
})
.catch(function(argument) {
log.debug(argument);
});
UPDATE
I've added this, now it's magicly works, but still don't know why. Becouse I'm using the same in other app (Ionic) and there is working - angular 1.2.7. I'm confused. Here is 1.3.4
$scope.$apply(function(){
$scope.products = _products;
})
The digest cycle is run using $scope.$apply(), not $scope.aplly().
That was typping error here. I'm using $scope.apply();