[英]Angular Controller Loading Before Data Is Loaded
我正在编写一个简单的应用程序,可从API加载电影信息。 加载后,我尝试使用Angular在简单的列表视图中显示电影。 我正确地加载了影片,但似乎已创建角度控制器并将影片数组发送到填充影片数组之前的视图。 我不确定如何解决这个问题。
var movieList = [];
var app = angular.module('top250', []);
// immediately make a call to the server to get data (array of movies from text file)
$.post('/', {}, function(data) {
init(data);
});
app.controller('MovieController', function() {
// should be setting this.movies to an array of 250 movies
this.movies = movieList;
});
function init(data) {
// cycle through array, use title to retrieve movie object, add to array to be sent to view
$.each(data, function(index, value) {
var title = value.split(' (')[0];
title = title.split(' ').join('+');
var url = 'http://www.omdbapi.com/?t=' + title + '&y=&plot=short&r=json';
$.getJSON(url, function(data) {
console.log('in get json', data);
var movieObj = data;
storeMovie(movieObj);
});
});
}
function storeMovie(movieObj) {
movieList.push(movieObj);
}
和我的HTML(尽管我确定这不是问题所在:
<body ng-controller="MovieController as MovieDB">
<div class="row">
<div class="large-12 columns">
<h1>IMDB Top 250 List</h1>
</div>
</div>
<div class="row">
<div class="large-12 columns" id="movie-list">
<div class="list-group-item" ng-repeat="movie in MovieDB.movies">
<h3>{{movie.Title}} <em class="pull-right">{{movie.Plot}}</em></h3>
</div>
</div>
<script src="js/foundation.min.js"></script>
<script>
$(document).foundation();
</script>
</body>
首先,我将您的ajax调用转换为角度工厂:
app.factory('MoviesService', function($http, $q) {
function getMovie(value) {
var title = value.split(' (')[0];
title = title.split(' ').join('+');
var url = 'http://www.omdbapi.com/?t=' + title + '&y=&plot=short&r=json';
return $http.get(url).then(function(res){ return res.data; });
}
return $http.post('/').then(function(res) {
return $q.all(res.data.map(getMovie));
});
});
然后我可以像这样消耗它:
app.controller('MovieController', function(MoviesService) {
var self = this;
MoviesService.then(function(movies) {
self.movies = movies;
});
});
您需要等待init
方法完成:
function init(data, complete) {
$.each(data, function(index, value) {
var title = value.split(' (')[0];
title = title.split(' ').join('+');
var url = 'http://www.omdbapi.com/?t=' + title + '&y=&plot=short&r=json';
$.getJSON(url, function(data) {
console.log('in get json', data);
var movieObj = data;
storeMovie(movieObj);
}).always(function(){ // count competed ajax calls,
// regardless if they succeed or fail
if(index === data.length -1)
complete(); // call callback when all calls are done
});
});
}
现在您可以执行以下操作:
app.controller('MovieController', function() {
$.post('/', {}, function(data) {
init(data, function(){
this.movies = movieList;
});
});
});
就我个人而言,我只是将movieList
保留在init
方法内,并在完成后与回调一起发送它,但这只是一个首选项。
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