使用 AngularJS 从 json 检索数据

Question

我正在从头开始学习 angular js，目前正在尝试从 json 文件中检索数据。

我正在使用 - nodejs, express, AngularJS.

之前我在使用 -

时遇到错误 "Unexpected token D"

$http.get("/models/driversList.json").success(function(response){$scope.driversList = response})

已经解决了，但现在我用当前代码得到了这样的东西 -

Drivers Championship Standings
1

我猜响应基本上是空白的，因此是“1”，但我不明白为什么会这样。

下面是我的文件 -

/app.js

app.use('/models',express.static(path.join(__dirname, 'private/data/db/models')));
app.use(express.static(path.join(__dirname, 'public')));
app.use('/scripts',express.static(path.join(__dirname, 'public/javascripts')));
app.use('/styles',express.static(path.join(__dirname, 'public/stylesheets')));

/javascripts/app.js

angular.module('F1FeederApp', [
  'F1FeederApp.controllers'
]);

/javascripts/controllers.js

angular.module('F1FeederApp.controllers', []).
controller('driversController', function($scope, $http) {
  $http({
    method: 'GET',
    url: '/models/driversList.json',
    data: {},
    transformResponse: function (data, headersGetter, status) {
        //This was implemented since the REST service is returning a plain/text response
        //and angularJS $http module can't parse the response like that.
        return {data: data};
    }
}).success(function(response){ alert('worked'); $scope.driversList = response}).error(function(response) {
    $scope.driversList = [
      {
          Driver: {
              givenName: response,
              familyName: 'Vettel'
          },
          points: 322,
          nationality: "German",
          Constructors: [
              {name: "Red Bull"}
          ]
      },
      {
          Driver: {
          givenName: 'Fernando',
              familyName: 'Alonso'
          },
          points: 207,
          nationality: "Spanish",
          Constructors: [
              {name: "Ferrari"}
          ]
      }
    ];
})  
});

driversList.json

[
      {
          Driver: {
              givenName: 'Eldorado',
              familyName: 'Vettel'
          },
          points: 322,
          nationality: "German",
          Constructors: [
              {name: "Red Bull"}
          ]
      },
      {
          Driver: {
          givenName: 'Fernando',
              familyName: 'Alonso'
          },
          points: 207,
          nationality: "Spanish",
          Constructors: [
              {name: "Ferrari"}
          ]
      }
    ]

index.html

<!DOCTYPE html>
<html>
<head>
  <title>F-1 Feeder</title>
  <script src="/scripts/angular.min.js"></script>
  <script src="/scripts/controllers.js"></script>
  <script src="/scripts/app.js"></script>
</head>

<body ng-app="F1FeederApp" ng-controller="driversController">
  <table>
    <thead>
      <tr><th colspan="4">Drivers Championship Standings</th></tr>
    </thead>
    <tbody> 
      <tr ng-repeat="driver in driversList">
        <td>{{$index + 1}}</td>
        <td>
          {{driver.Driver.givenName}}&nbsp;{{driver.Driver.familyName}}
        </td>
        <td>{{driver.Constructors[0].name}}</td>
        <td>{{driver.points}}</td>
      </tr>
    </tbody>
  </table>  
</body>
</html>

编辑:

@rattanak

要回答第 3 点，是的，如果我只是将数组变量分配给范围变量，它就可以工作。 error() 中的部分是之前工作的部分。

我也尝试了第 1 点，似乎 json 出现在 "data" 中，所以我将 response.data 分配给 driversList，现在出现此错误 -

Data:
[{Driver:{givenName:'Eldorado',familyName:'Vettel'},points:322,nationality:"German",Constructors:[{name:"Red Bull"}]}]

Error: [ngRepeat:dupes] http://errors.angularjs.org/1.4.7/ngRepeat/dupes?p0=driver%20in%20driversList.data&p1=string%3Ar&p2=r
    at Error (native)
    at http://localhost:3000/scripts/angular.min.js:6:416
    at http://localhost:3000/scripts/angular.min.js:280:39
    at Object.fn (http://localhost:3000/scripts/angular.min.js:129:401)
    at n.a.$get.n.$digest (http://localhost:3000/scripts/angular.min.js:130:483)
    at n.a.$get.n.$apply (http://localhost:3000/scripts/angular.min.js:133:512)
    at h (http://localhost:3000/scripts/angular.min.js:87:376)
    at K (http://localhost:3000/scripts/angular.min.js:91:499)
    at XMLHttpRequest.z.onload (http://localhost:3000/scripts/angular.min.js:93:37)

表示有重复

Answer 1

$http 服务似乎没有成功解析。如果不实际测试代码，很难说清楚。使用 Chrome 开发控制台，我将通过以下方式调试代码：

在 promise 的成功函数中使用 console.log($scope.driversList)。
在promise的错误函数中使用console.log(error)
您是否能够在不使用 $http 服务的情况下使代码工作，即只需将数据的数组变量分配给 $scope.driversList.

如果你能提供githublink什么的，我很乐意为你测试。

Answer 2

您的文件 driverlist.json 不包含有效的 JSON 代码。此代码应为：

[
  {
      "Driver": {
          "givenName": "Eldorado",
          "familyName": "Vettel" },
      "points": 322,
      "nationality": "German",
      "Constructors": [
          {"name": "Red Bull"}
       ]
  },
  {
      "Driver": {
        "givenName": "Fernando",
        "familyName": "Alonso"
      },
      "points": 207,
      "nationality": "Spanish",
      "Constructors": [
          {"name": "Ferrari"}
      ]
  }
]

更正此问题并重试。

JSON 总是使用双引号 (") 而不是单引号 (')

有关正确 JSON 的更多信息，请参阅 http://www.json.org/

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