AngularJS $ http.get JSON文件返回未定义

Question

I am trying to get data from a JSON file to display in my AngularJS app using $http.get(...). When I run an alert with JSON.stringify, the alert says 'undefined'. Here is my code:

JS

var pplApp = angular.module('pplApp', [ 'ngAnimate', 'ngSanitize', 'utilServices' ]);

  pplApp.controller('pplCtrl', function($scope, $http) {
    $http.get('people.json').then(function(data) {
      alert(JSON.stringify(data.People));
      $scope.peoples = data.People;
    });
  });

JSON

{
"People": [
  {
    "name": "Andrew Amernante",
    "rating": 3,
    "img": "http://www.fillmurray.com/200/200",
  "Description": "Gluten­free cray cardigan vegan. Lumbersexual pork belly blog, fanny pack put a bird on it selvage",
  "Likes": [
    "Dogs",
    "Long walks on the beach",
    "Chopin",
    "Tacos"
  ],
  "Dislikes": [
    "Birds",
    "Red things",
    "Danish food",
    "Dead Batteries"
  ]
}
]
}

What am I missing?

Update: Here is my app in Plunker

Answer 1

您不应将点运算符与JSON.stringify一起使用，因为它只是一个字符串，请将其更改为

  alert(JSON.stringify(data));

Answer 2

The result is a response object (not the data itself). You can access the data as response.data

pplApp.controller('pplCtrl', function($scope, $http) {
    $http.get('people.json').then(function(response) {
      alert(JSON.stringify(response.data.People));
      $scope.peoples = response.data.People;
    });
  });

Answer 3

Here data is a JSON string not object, so you can not use data.People , instead you just need to pass data to JSON.parse .

var pplApp = angular.module('pplApp', [ 'ngAnimate', 'ngSanitize', 'utilServices' ]);
  pplApp.controller('pplCtrl', function($scope, $http) {
    $http.get('people.json').then(function(data) {
      var response = JSON.parse(data);
      $scope.peoples = response.People;
    });
});

I checked with your json string and works using following code.

var json = '{"People": [{"name": "Andrew Amernante","rating": 3,"img": "http://www.fillmurray.com/200/200","Description": "Gluten­free cray cardigan vegan. Lumbersexual pork belly blog, fanny pack put a bird on it selvage","Likes": ["Dogs","Long walks on the beach","Chopin","Tacos"],"Dislikes": ["Birds","Red things","Danish food","Dead Batteries"]}]}';
var response = JSON.parse(json);
$scope.peoples = response.People;