AngularJS $http.get JSON 文件返回未定义

Question

我正在尝试使用 $http.get(...) 从 JSON 文件中获取数据以显示在我的 AngularJS 应用程序中。当我使用 JSON.stringify 运行警报时，警报显示“未定义”。这是我的代码：

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"
  ]
}
]
}

我错过了什么？

更新：这是我在Plunker 中的应用程序

Answer 1

结果是一个响应对象（不是数据本身）。您可以通过response.data 访问数据

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 2

您不应该在 JSON.stringify 中使用点运算符，因为它只是一个字符串，请将其更改为，

  alert(JSON.stringify(data));

Answer 3

这里 data 是 JSON 字符串而不是对象，所以不能使用 data.People，而是您只需将 data 传递给 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;
    });
});

我检查了您的 json 字符串并使用以下代码工作。

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;