I've just started using AngularJS, and as a project I decided to build a simple app for managing bookmarks. I want to be able to maintain a list of bookmarks and add/remove items. I'm using Django with Django REST framework, and Angular.
So far I've written a service to grab the bookmarks from the database, and I can print them to the console from my controller, but ng-repeat doesn't seem to be seeing them.
Here's my code for the service:
.factory('BookmarkService', ["$http", function ($http) {
var api_url = "/api/bookmarks/";
return {
list: function () {
return $http.get(api_url).then(function (response) {
return response.data
})
}
}
}]);
And for the controller:
.controller("ListController",
["$scope", "BookmarkService", function ($scope, BookmarkService) {
$scope.bookmarks = BookmarkService.list();
console.log($scope.bookmarks);
}]);
And here's the HTML:
<div ng-controller="ListController as listCtrl">
<md-card>
<md-card-content>
<h2>Bookmarks</h2>
<md-list>
<md-list-item ng-repeat="bookmark in listCtrl.bookmarks">
<md-item-content>
<div class="md-tile-content">
<p>{[{ bookmark.name }]} - {[{ bookmark.url }]}</p> // used interpolateProvider to allow "{[{" instead of "{{"
</div>
<md-divider ng-if="!$last"></md-divider>
</md-item-content>
</md-list-item>
</md-list>
</md-card-content>
</md-card>
</div>
When I print to the console from the controller I can see a promise object but ng-repeat isn't repeating:
image of promise object
I'd really appreciate if someone could help me to find my mistake and to understand why it is happening. I'm still not entirely comfortable with how all these parts fit together.
Thanks for your time!
There's two problems that I see with the code in question.
The first is that using the controller as syntax (ng-controller="ListController as listCtrl") requires properties to be bound to the controller instance and not to the scope if you address them using the controller name. In your case,
.controller("ListController",
["BookmarkService", function (BookmarkService) {
this.bookmarks = BookmarkService.list();
console.log(this.bookmarks);
}]);
The second is that you are assigning a promise to your $scope.bookmarks property. The repeater is expecting an array of objects to iterate over. You really want to assign the value resolved by the promise to $scope.bookmarks.
Instead of this
$scope.bookmarks = BookmarkService.list();
Do this
BookmarkService.list().then(function(result){
this.bookmarks = result;
});
The final version of your controller should look something like this
.controller("ListController",
["BookmarkService", function (BookmarkService) {
this.bookmarks = BookmarkService.list();
console.log(this.bookmarks);
}]);
This is simple. Ng-repeat is not working with promises. So, you can go with two ways:
BookmarkService.list().then(function(responce){
$scope.bookmarks = responce.data;
});
Another way is to create own repiter ^)
Ng-repeat doc
Related
I have a utility controller build to manage documents attachments for reusing across my application.
<div ng-controller="someController">
<div ng-controller="documentController as temp1"></div>
<div ng-controller="documentController as temp2"></div>
</div>
Under the parent controller i.e. someController I have a broadcast method..
var module = angular.module("MyModule");
module.controller("someController",
function ($scope) {
$scope.$broadcast("callSomeFunctionInDocumentsController");
});
module.controller("documentController",
function($scope) {
$scope.$on("callSomeFunctionInDocumentsController", function() {
//do something here
});
});
Now the problem I am facing is that since the documentController is added twice to the view, the $on method is executed twice as well. Whereas based on some condition I would want to call the $on method either in temp1 or temp2 instance and not both.
I am not sure if what I wish to achieve is possible but any help will be much appreciated.
Thanks.
The $broadcast works simply: everyone who registered is notified through $on.
In your example, both controllers are registered.
So why do you use the same controller twice? Maybe worth to switch to component?
What about this one:
<div ng-controller="someController">
<div ng-controller="documentController as temp1"></div>
<div ng-if="oneCtrlGotNotification" ng-controller="documentController as temp2"></div>
</div>
where oneCtrlGotNotification is some flag (maybe under $rootScope).
So you will display second controller only when 1st already notified.
But it is a workaround.
One approach is to give a unique id to each element with a controller:
<div ng-controller="someController">
<div id="temp1" ng-controller="documentController as temp1"></div>
<div id="temp2" ng-controller="documentController as temp2"></div>
</div>
Then use the $attrs local to differentiate:
app.controller("documentController", function($scope, $attrs) {
$scope.$on("callSomeFunctionInDocumentsController", function() {
if ($attrs.id == "temp1") {
//do something specific to "temp1" controller
});
});
})
For more information, see
AngularJS Comprehensive Directive API Reference - controller
AngularJS $attrs Type API Reference
I have a problem with displaying records in angular...
query like this..
Angular Controller
angular.module('MyApp')
.controller('CountriesCtrl', function ($scope, $rootScope, $routeParams, Countries) {
Countries.query({}, function (countries) {
//Countries.get() return Expected response to contain an object but got an array so i use countries.query....
$scope.countries = countries;
console.log(countries);
});
})
which returns
.. Using the returned data How can I show in angular with ng-repeat..
thank you
Use ng-repeat over the array:
<div ng-repeat="country in countries">
<span>{{country.name}}</span>
</div>
I suggest anyway to follow some good tutorial and the documentation: this is pretty much basic stuff. Documentation on ng-repeat can be found here
Here is the relevant code in my view:
p(ng-repeat="t in todos")
input(
type="checkbox",
ng-model="t.done",
ng-click="clearItem($event)"
)
{{t.text}} done? {{t.done}}
When the checkbox is clicked, I want the appropriate object in the todos array to be removed from the database.
My clearItem function is as follows:
$scope.clearItem = function(event) {
todoRef.remove($scope.t);
}
However, this removes all the entries in my database. I want it to remove only the specific object in question. Is there anyway for me to do this?
Ok, figured it out.
When looping using ng-repeat, use (id, t) in todos. This allows you to send id as the parameter to the ng-click function, and $scope.todos.$remove(id) works just fine.
To provide a more complete example for anyone else that lands here, according to Firebase's documentation for AngularFire this would be the preferred way, and I believe the easiest way to remove an object:
// Create an app. Synch a Firebase array inside a controller
var myApp = angular.module("myApp", ["firebase"]);
// inject $firebaseArray
myApp.controller("TodoCtrl", ["$scope", "$firebaseArray", function($scope, $firebaseArray) {
// bind $scope.todos to Firebase database
$scope.todos = $firebaseArray(myFirebaseRef.child("todo"));
// create a destroy function
$scope.removeTodo = function(todo) {
$scope.todos.$remove(todo);
};
}]);
In your view, you could do something like below. Note that you could bind the removeTodo function to a checkbox as the question specifies, or a regular old <a href> element:
// In your view
<div ng-controller="TodoCtrl">
<ul>
<li ng-repeat="todo in todos">
{{ todo.text }} : <a href ng-click="removeTodo(todo)">X</a>
</li>
</ul>
</div>
Hope that helps!
A better solution would be to have $scope.clearItem() take the object t as an argument, instead of $event.
HTML - <p ng-repeat="t in todos"><input... ng-click="clearItem(t)">
JS - $scope.clearItem = function(obj) {todoRef.$remove(obj)};
The only way I'm able to remove the item is using a loop on the array we get from firebase.
var ref= new Firebase('https://Yourapp.firebaseio.com/YourObjectName');
var arr_ref=$firebaseArray(ref);
for(var i=0;i<arr_ref.length;i++){
if(key==arr_ref[i].$id){
console.log(arr_ref[i]);
arr_ref.$remove(i);
}
}
The easiest way to remove the object would be
scope.clearItem = function(event) {
todoRef.$loaded().then(function(){
todoRef.$remove($scope.t)
});
The asynchronous nature of the beast has gotten me a few times.
I'm creating an ajax search page which will consist of a search input box, series of filter drop-downs and then a UL where the results are displayed.
As the filters part of the search will be in a separate place on the page, I thought it would be a good idea to create a Service which deals with coordinating the inputs and the ajax requests to a search server-side. This can then be called by a couple of separate Controllers (one for searchbox and results, and one for filters).
The main thing I'm struggling with is getting results to refresh when the ajax is called. If I put the ajax directly in the SearchCtrl Controller, it works fine, but when I move the ajax out to a Service it stops updating the results when the find method on the Service is called.
I'm sure it's something simple I've missed, but I can't seem to see it.
Markup:
<div ng-app="jobs">
<div data-ng-controller="SearchCtrl">
<div class="search">
<h2>Search</h2>
<div class="box"><input type="text" id="search" maxlength="75" data-ng-model="search_term" data-ng-change="doSearch()" placeholder="Type to start your search..." /></div>
</div>
<div class="search-summary">
<p><span class="field">You searched for:</span> {{ search_term }}</p>
</div>
<div class="results">
<ul>
<li data-ng-repeat="item in searchService.results">
<h3>{{ item.title }}</h3>
</li>
</ul>
</div>
</div>
</div>
AngularJS:
var app = angular.module('jobs', []);
app.factory('searchService', function($http) {
var results = [];
function find(term) {
$http.get('/json/search').success(function(data) {
results = data.results;
});
}
//public API
return {
results: results,
find: find
};
});
app.controller("SearchCtrl", ['$scope', '$http', 'searchService', function($scope, $http, searchService) {
$scope.search_term = '';
$scope.searchService = searchService;
$scope.doSearch = function(){
$scope.searchService.find($scope.search_term);
};
$scope.searchService.find();
}]);
Here is a rough JSFiddle, I've commented out the ajax and I'm just updating the results variable manually as an example. For brevity I've not included the filter drop-downs.
http://jsfiddle.net/XTQSu/1/
I'm very new to AngularJS, so if I'm going about it in totally the wrong way, please tell me so :)
In your HTML, you need to reference a property defined on your controller's $scope. One way to do that is to bind $scope.searchService.results to searchService.results once in your controller:
$scope.searchService.results = searchService.results;
Now this line will work:
<li data-ng-repeat="item in searchService.results">
In your service, use angular.copy() rather than assigning a new array reference to results, otherwise your controller's $scope will lose its data-binding:
var new_results = [{ 'title': 'title 3' },
{ 'title': 'title 4' }];
angular.copy(new_results, results);
Fiddle. In the fiddle, I commented out the initial call to find(), so you can see an update happen when you type something into the search box.
The problem is that you're never updating your results within your scope. There are many approaches to do this, but based on your current code, you could first modify your find function to return the results:
function find(term) {
$http.get('/json/search').success(function(data) {
var results = data.results;
});
//also notice that you're not using the variable 'term'
//to perform a query in your webservice
return results;
}
You're using a module pattern in your 'public API' so your searchService returns the find function and an array of results, but you'd want to make the function find to be the responsible for actually returning the results.
Setting that aside, whenever you call doSearch() in your scope, you'd want to update the current results for those returned by your searchService
$scope.doSearch = function(){
$scope.searchService.results = searchService.find($scope.search_term);
};
I updated your jsfiddle with my ideas, is not functional but i added some commments and logs to help you debug this issue. http://jsfiddle.net/XTQSu/3/
I am new to Angular.js. I currently have the following html code, where I define my div with my file html ( ng-include ) and my controller ( ng-controller ):
<div id="customerinformation-maxi" ng-include="'pages/customerinformation-maxi.html'" ng-controller="customerInformationMaxiController" class="col-md-12"></div>
This is the html code for the called html in directive ng-include ( customer-information.html ):
<div class="row">
<div class="col-md-2">
<span>Customer Number</span>
<span>{{customer.number}}</span>
</div>
<div class="col-md-2">
<span>Portfolio</span>
<span>{{custom.portfolio}}</span>
</div>
</div>
This is the js controller:
angularRoutingApp.controller('customerInformationMaxiController', function($scope, $http) {
//Here i need to load the model variable with a literal text {{customer.number}} and {{customer.portfolio}}, how could do it? using scope object? with a json file?
});
Here I need to load the model variable with a literal text {{customer.number}} and {{customer.portfolio}}.
How could do it? Using scope object? With a json file?
Thanks for any help.
Yes, you should do it using the $scope object.
To get a general overview, here is a hello-world example:
<div ng-controller="HelloController">
{{ helloMessage }}
</div>
And in you controller's code (js file or script tag into the html):
var myApp = angular.module('myApp',[]);
myApp.controller('HelloController', ['$scope', function($scope) {
$scope.helloMessage= 'Hello World!';
}]);
But I foresee some nesting in the provided snippet of your question, so you 're probably dealing with a collection of objects which means that you have to iterate through it, in the html part, using the ng-repeat directive, like:
<tr ng-repeat="customer in customers>
<td>{{customer.number}}</td>
<td>{{customer.portfolio}}</td>
</tr>
So, your controller's functionality should contain the customers object, like:
angularRoutingApp.controller('customerInformationMaxiController', function($scope, $http) {
var customers=[
{
number:'123',
portfolio: 'blah blah'
},
{
number:'124',
portfolio: 'blah blah'
},
{
number:'125',
portfolio: 'blah blah'
}
];
});
For further reference, you could read two respective example I have written:
Angular.js Controller Example
Angular.js JSON Fetching Example
The second one is only to see a sample usage of traversing collections, it is not meant that you have to use json, as you stated in your question; but I see that you also defined the $http service in your controller, so if it's about data that are going to be fetched from a remote destination, the JSON Fetching Example should probably help you better).
You should use scope objects to give values to your modal variables.
angularRoutingApp.controller('customerInformationMaxiController', function($scope, $http) {
$scope.customer.number = 'sample number';
$scope.customer.portfolio = 'sample portfolio';
});