Accessing nested JSON with AngularJS
Question
I'm trying to make and mobile webapp with angular.js, hammer.js and topcoat.
I'm having some trouble on displaying data from a Json file like this one:
{
"version": "1",
"artists": {
"artist1": {
"name": "artist1name",
"jpeg": "../img/artist/artist1.jpg",
"albums": {
"album1": {
"type": "cd",
"title": "titlealbum1",
"subtitle": "subtitlealbum1",
"jpeg": "../img/album1.jpg",
"price": "12.00",
"anystring1": "anystring1album1",
"anystring2": "anystring2album1"
},
"album2": [{
"type": "cd",
"title": "titlealbum2",
"subtitle": "subtitlealbum2",
"jpeg": "../img/album2.jpg",
"price": "12.00",
"anystring1": "anystring1album2",
"anystring2": "anystring2album2"
}],
"album3": [{
"type": "cd",
"title": "titlealbum3",
"subtitle": "subtitlealbum3",
"jpeg": "../img/album3.jpg",
"price": "13.00",
"anystring1": "anystring1album3",
"anystring2": "anystring2album3"
}]
}
},
"artist2": {
"name": "artist2name",
"jpeg": "../img/artist/artist2.jpg",
My js file is like this:
angular.module('list', [])
function ListCtrl ($scope, $http) {
$http({method: 'GET', url: 'json/json_price_1.json'}).success(function(data)
{
$scope.artists = data.artists; // response data
$scope.albums = data.artists.albums; /this is where im getting trouble
});
};
My HTML file is like this:
<body ng-app="list">
<h3>Titulos</h3>
<div ng-controller="ListCtrl">
<ul ng-repeat="artist in artists">
<li >{{artist.name}}</li>
</ul>
</div>
<div ng-controller="ListCtrl">
<ul ng-repeat="album in albums">
<li >{{album.title}}</li> //not working here.
</ul>
</div>
I want to display all albums and if my user select an specific artist I want to filter those albums. The question here is how will I select on this nested json. BTW, the artist.name is displaying correctly.
Second question is, how will I filter those artists with a text field.
4 answers
solution1
14 ACCPTED 2013-11-07 00:01:33
I suggest something like this:
$http({method: 'GET', url: 'json/json_price_1.json'}).success(function(data) {
$scope.artists = [];
angular.forEach(data.artists, function(value, key) {
$scope.artists.push(value);
});
$scope.isVisible = function(name){
return true;// return false to hide this artist's albums
};
});
And then:
<div ng-controller="ListCtrl">
<ul>
<li ng-repeat="artist in artists">{{artist.name}}</li>
</ul>
<ul ng-repeat="artist in artists" ng-show="isVisible(artist.name)">
<li ng-repeat="album in artist.albums">{{album.title}}</li>
</ul>
</div>
solution2
7 2013-11-07 09:08:53
All your problems start with your JSON. I recommend you to simplify your JSON and make each Artist and Album an Object and Artists and Albums arrays of objects.
Try this one:
{
"version": "1",
"artists": [
{
"name": "artist1name",
"jpeg": "../img/artist/artist1.jpg",
"albums": [
{
"type": "cd",
"title": "titlealbum1",
"subtitle": "subtitlealbum1",
"jpeg": "../img/album1.jpg",
"price": "12.00",
"anystring1": "anystring1album1",
"anystring2": "anystring2album1"
},
{
"type": "cd",
"title": "titlealbum2",
"subtitle": "subtitlealbum2",
"jpeg": "../img/album2.jpg",
"price": "12.00",
"anystring1": "anystring1album2",
"anystring2": "anystring2album2"
},
{
"type": "cd",
"title": "titlealbum3",
"subtitle": "subtitlealbum3",
"jpeg": "../img/album3.jpg",
"price": "13.00",
"anystring1": "anystring1album3",
"anystring2": "anystring2album3"
}
]
},
{
"name": "artist2name",
"jpeg": "../img/artist/artist2.jpg",
"albums": []
}
]
}
An Array can be empty as in my example (artist2 has no album assigned).
You have also wrong asignment in your ListCtrl , you cannot assign and display albums until you know the correct Artist . If you want to diplay all albums of all artists, you need to iterate through all artists.
Example controller:
angular.module('list', []);
function ListCtrl($scope, $http) {
$http({
method: 'GET',
url: 'json_price_1.json'
}).success(function(data) {
$scope.artists = data.artists; // response data
$scope.albums = [];
angular.forEach(data.artists, function(artist, index) {
angular.forEach(artist.albums, function(album, index){
$scope.albums.push(album);
});
});
});
}Here is modified Plunkr based on jessie example: http://plnkr.co/edit/zkUqrPjlDYhVeNEZY1YR?p=preview
solution3
5 2013-11-07 05:53:25
Check Plunker link
Answer to your question "how will i select on this nested json?"
$.each(data.artists, function(index, element){
$.each(this.albums, function(index, element){
$scope.albums.push(element);
});
});
Answer to your question "how will i filter those artists with a text field?"
<input ng-model="searchText.artistName">
<ul ng-repeat="album in albums | filter:searchText">
<li>{{album.title}}</li>
</ul>
solution4
0 2016-09-11 19:24:20
<ul ng-repeat="artist in artists">
<li>
<p>{{artist.name}}</p>
<ul ng-repeat="(key,val) in artist.albums">
<li>{{key}} - {{val}}</li>
</ul>
</li>
</ul>
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