I am able to pull data from firebase and show it in the browser console, but how do I actually display it as text on a webpage?
Here's the code I have now:
<script>
var ref = new Firebase("https://datatest-104.firebaseio.com");
ref.orderByChild("location").equalTo("United States").on("child_added", function(snapshot) {
console.log(snapshot.key());
});
//My code that I'm trying:
document.write(snapshot.key());
</script>
I am trying to use document.write(snapshot.key()); but am not sure how it works.
Put document.write(snapshot.key());into the function instead of out of it:
ref.orderByChild("location").equalTo("United States").on("child_added", function(snapshot) {
document.write(snapshot.key());
});
Then, the snapshotwill be defined, so it'll write onto the page.
Related
I am trying to make a post request using Google Cloud Endpoints and AngularJS when the page loads so I can get the user information and fill the profile picture, profile description and so on...
I am able to run requests when pressing a button or something like that but can't call the google endpoints automatically when the page loads and that is whats I am trying to achieve.
Below is the HTML part where the {{userPicture}} should've been loaded in the angular script:
(HTML)
<div class="form-group">
<label class="col-sm-3 control-label">Profile image</label>
<div class="col-sm-9" ng-controller='initController'>
<img src="{{userPicture}}" class="user-image-profile" alt="User Image">
</div>
</div>
(ANGULAR)
controllers.initController = function($scope, $http){
$scope.userForm = {
"userEmail" : $.cookie('auth')
};
gapi.client.igardenendpoints.getProfile($scope.userForm).execute(function(resp) {
$scope.$apply(function () {
if (resp.error) {
$scope.backmessage.messagetext = "GetProfile Error!"
console.log("error");
} else {
if (resp.userEmail == "TEMPLATE"){
$scope.backmessage.messagetext = "Error please try again!"
}else{
$scope.userPicture = 'https://filiperebollo1986.appspot.com/serve?blob-key=' + resp.profilePicKey;
}
}
});
});
}
error
I also tried to use the following:
$scope.initData = function () {
gapi.client.igardenendpoints.getProfile($scope.userForm)...........
}
and run the function at the end of the controller, like:
$scope.initData();
But both does not work, any help on that?
I will not be able to help you in 100% as I'm not using Google Cloud, but will try to do my best.
First of all, to get the data it's usually better to use services rather than do it in the controller.
But anyway, your problem seems to be different. In your HTML did you include your script and client API?
I was able to fix my problem and bellow is the solution:
The problem was that at the moment of my call, the script may not have been loaded once I was using the "ng-app" directive directly on the body TAG.
Now I am injecting the angular module dinamicaly just after my API loading:
function googleOnLoadCallback(){
var apisToLoad = 1; // must match number of calls to gapi.client.load()
var gCallback = function() {
if (--apisToLoad == 0) {
//Manual bootstraping of the application
var $injector = angular.bootstrap(document, ['authModule']);
console.log('Angular bootstrap complete ' + gapi);
};
};
gapi.client.load('igardenendpoints', 'v12', gCallback, '//' + window.location.host + '/_ah/api');
}
</script>
<script src="https://apis.google.com/js/client.js?onload=googleOnLoadCallback"></script>
And now It is working!!!!
The only problem now is that when the page loads it appears the {{example}} in the page, is it possible to avoid the {{}} to appear?
I am using $window.history.back() to go 1 step back in my Ionic + Angular app.
It has an issue: if my URL is in proper form (http://localhost:8100/jobs.html) then it is working properly, but if my URL is in this form (http://localhost:8100/jobs.html#/category) then it is not working and does not go back.
Here is my function:
$scope.back3=function() {
$window.history.back();
}
I will be thankful for any help.
You need to use window.history.go(-1); in $ionicPlatform.registerBackButtonAction event. It will go back on pressing back button key. below is the example :
app.controller('HomeCtrl', function($ionicPlatform){
$ionicPlatform.registerBackButtonAction(onBackKeyDown, 100);
function onBackKeyDown() {
window.history.go(-1);
}
}
});
For giving back button action on any button use following code:
HTML
<div ng-click="goBack()">Back</div>
JavaScript
$scope.goBack = function() {
window.history.back();
};
If you want to use Ionic Framework history navigation you should also use proper Ionic Framework history object:
Use this if you want to go to the previous view:
$ionicHistory.goBack();
More about it can be found here: $ionicHistory
I create a forEach loop. I can access data from Firebase with this loop and I can change variable. But I can not save these changes on Firebase. How can I save these changes? Here's my code:
var posts = $firebaseArray(ref);
posts.$loaded().then(function(item){
item.forEach(function(childSnapshot){
var num = childSnapshot.point-1;
childSnapshot.lastPoint = num;
});
});
You're using the AngularFire framework, which builds UI bindings on top of Firebase's regular JavaScript SDK. You should only be using it for things that you're binding to the Angular UI elements. For everything else, you're likely better off using Firebase's regular JavaScript SDK.
If I understand your requirement correctly, you're trying to loop over all child nodes in a database location once and modify a property. If so:
ref.once('value', function(snapshot) {
snapshot.forEach(function(childSnapshot) {
var child = childSnapshot.val();
childSnapshot.ref().update({ lastPoint: child.point - 1 });
});
});
The relevant sections of the Firebase documentation are on reading data once and updating data.
Since AngularFire is built on top of Firebase's JavaScript SDK, they work perfectly together. So if elsewhere you bind the posts to the scope ($scope.posts = $firebaseArray(ref)), they will be updated automatically when you update the last point with the above snippet.
You can create a service that contains a getter and a setter. It would look something like this;
angular.module('app').factory("DataHandler",
function() {
var data;
return {
get: function() {
return data;
},
set: function(something) {
data = something;
}
}
}
);
Then in your code you would call:
var posts = $firebaseArray(ref);
posts.$loaded().then(function(item){
item.forEach(function(childSnapshot){
var num = childSnapshot.point-1;
childSnapshot.lastPoint = num;
DataHandler.set(childSnapshot);
});
});
Then wherever/whenever you need to get that data just call:
Datahandler.get();
I am new to backbonejs. What I am trying to do is, render a template on page load and pass model as data parameter in _.template function. Here is my bacbone code:
var Trip = Backbone.Model.extend({
url: '/trips/' + trip_id + '/show'
});
var InviteTraveller = Backbone.View.extend({
el: '.page',
render: function () {
var that = this;
var trip = new Trip();
trip.fetch({
success: function(){
console.log(trip); //logs trip object correctly
var template = _.template($('#invite-traveller-template').html(), {trip: trip});
that.$el.html(template);
}
});
}
});
var Router = Backbone.Router.extend({
routes: {
'': 'fetchTrip'
}
});
var inviteTraveller = new InviteTraveller();
var router = new Router();
router.on('route:fetchTrip',function () {
inviteTraveller.render();
});
Backbone.history.start();
And here is my sample template:
<script type="text/template" id="invite-traveller-template">
<h3>Trip</h3>
<h3><%= trip.get('name') %></h3>
</script>
On running, I am getting the this in browser window and console shows:
trip is not defined
I am facing this issue since yesterday but could not figure out the solution yet. Not understanding what is going wrong, code also seems to be right. Any help would be greatly appreciated.
Update:
I removed
inviteTravellers.render();
from router.on() and then reloaded the page in browser. I still got same error which means that <script></script> (template) is being compiled before calling render() of InviteTraveller view. What can be the possible reason for this?
I had the same issue (underscore v1.8.2). My fix:
var template = _.template($('#invite-traveller-template').html());
var compiled = template({trip: trip});
that.$el.html(compiled);
You're passing the whole model to the template. Typically you would call model.toJSON and then pass its result to the template. Additionally using <%= in your template to render the attribute, which is meant for interpolating variables from that JSON object you're passing.
You can pass a whole model to the template and use <% ... %> to execute pure Javascript code and use print to get the attribute but it's probably overkill.
Have a look at this fiddle.
You code work perfectfly, here's it
I think that your problem came from another code, not the one you have posted, because there's no way for your view to render if you remove :
inviteTravellers.render();
Try to chaneg <h3><% trip.get('name'); %></h3> by <h3><%= trip.get('name') %></h3>
My code seems to be right but still my template was getting compiled on page load and I was getting trip is not defined error. I did not understand the reason of this behavior yet.
I solved this issue by using handlebarsjs instead of default underscore templates.
I am building an application using the Backbone Boilerplate, and am having some trouble getting underscore template variables to work. I have a resource named Goal. My Goal View's render function looks like this:
render: function(done) {
var view = this;
namespace.fetchTemplate(this.template, function(tmpl) {
view.el.innerHTML = tmpl();
done(view.el);
});
}
I'm calling it inside of another view, like so:
var Goal = namespace.module("goal");
App.View = Backbone.View.extend({
addGoal: function(done) {
var view = new Goal.Views.GoalList({model: Goal.Model});
view.render(function(el) {
$('#goal-list').append(el);
});
}
});
I'm using local storage to save my data, and it's being added just fine. I can see it in the browser, but for some reason, when I load up the app, and try to fetch existing data, i get this error:
ReferenceError: Can't find variable: title
Where title is the only key I'm storing. It is a direct result of calling:
tmpl();
Any thoughts are greatly appreciated.
Your template is looking for a variable title, probably like this <%- title %>. You need to pass it an object like this tmpl({ title: 'Some title' })
Turns out, I wasn't passing in the model when i created the view, which was making it impossible to get the models data. Once I passed in the model correctly, I could then pass the data to tmpl, as correctly stated by #abraham.
render: function(done) {
var
view = this,
data = this.model.toJSON();
clam.fetchTemplate(this.template, function(tmpl) {
view.el.innerHTML = tmpl(data);
done(view.el);
});
},