Question

我有数据json计划航班，但json没有显示所有信息。它只是返回null一些数据，所有数据显示null已经存在。我想检查我的数据，如果有空，我发布我的相同的问题，但他的不同关于jquery。

短代码：

nameApp.controller('bgwCtrl', function($scope, $http,$interval,labeltext,$timeout,$ionicLoading, $ionicPopup,arrivecss) {

  $scope.loading = true;
  // Setup the loader
  $ionicLoading.show({
    content: 'Loading',
    animation: 'fade-in',
    showBackdrop: true,
    maxWidth: 200,
    showDelay: 0
  });

     $scope.reload = function () {

    $http.get("v1/airport.json?code=bgw")
    .then(function(response) {

    $timeout(function () {
    $ionicLoading.hide();
  $scope.labeltext=labeltext;
  $scope.check=arrivecss;
   $scope.time= response.data.result.response.airport.pluginData.schedule.arrivals.timestamp;

       var dailyData = response.data.result.response.airport.pluginData.schedule.arrivals.data;
         console.log(response.data.result.response.airport.pluginData.schedule.arrivals.data);

            $scope.dailyForecast = [null];

            for(var i=0; i<25; i++)
            {
                 $scope.dailyForecast[i] = {callsin: dailyData[i].flight.identification.id,
                                            callsign: dailyData[i].flight.identification.number.default,
                                            statu: dailyData[i].flight.status.generic.status.text,
                                            airline: dailyData[i].flight.airline.code.iata,
                                            from: dailyData[i].flight.airport.origin.position.region.city,
                                            timear: dailyData[i].flight.time.scheduled.arrival,
                                            generic: dailyData[i].flight.status.text,
                                            ident: dailyData[i].flight.identification.number.default,
                                            timearrvie: dailyData[i].flight.time.estimated.arrival,
                                            timearr: dailyData[i].flight.status.generic.eventTime.local,
                                            model: dailyData[i].flight.aircraft.model.code,
                                            icon: dailyData[i].flight.status.icon,
                                            winir: dailyData[i].flight.airline.name,




                                            };


            }   

          console.log(response)
  }, 2000);
             return response;

    });
///response end///
  function switchEstimated(){
     $scope.show=!$scope.show;
  }

  $interval(switchEstimated,3000);
     $timeout(function(){
      $scope.reload();
    },30000)

  };
  ///reload end///
  $scope.reload();
      $scope.loading = false;

});

my data json

错误：departures[i].flight.airport.origin.position is undefined

Answer 1

小心你要找的东西。我看到了那条线

params: [:query, :type, :sort] # -> pass each into the link like "key: value"

你说它给departures[i].flight.airport.origin.position应该是

undefined

您已将dailyData[i].flight.airport.origin.position数组存储在data

中

Answer 2

您收到错误departures[i].flight.airport.origin.position is undefined，因为它实际上是未定义的。如果您查看JSON数据的结构，您会发现：

departures:{item:{},page:{},timestamp:value,data:[]}

所以你必须改变你的电话：

departures.data[i].flight.airport.origin.destination.position

如何在angularjs $ http中检查null

2 个答案: