如何在dragend和google maps自动完成后获得国家名称?

这是我使用的代码:

  defaultLatLong = {
    lat: 45.4667971, 
    lng: 9.1904984
  };

  var map = new google.maps.Map(document.getElementById('map-canvas_1'), {
    center: defaultLatLong,
    zoom: 2,
    mapTypeId: 'roadmap',
    disableDefaultUI: true,
    zoomControl: true
  });

  var input = document.getElementById('location-text-box');

  var autocomplete = new google.maps.places.Autocomplete(input);

  autocomplete.bindTo('bounds', map);

  var marker = new google.maps.Marker({
    map: map,
    position: defaultLatLong,
    draggable: true,
    clickable: true
  });

  google.maps.event.addListener(marker, 'dragend', function(marker) {

    locationsArray.push(country);
    console.log(country);
    var latLng = marker.latLng;
    currentLatitude = latLng.lat();
    currentLongitude = latLng.lng();
    var latlng = {
      lat: currentLatitude,
      lng: currentLongitude
    };
    var geocoder = new google.maps.Geocoder;
    geocoder.geocode({
      'location': latlng
    }, function(results, status) {
      if (status === 'OK') {
        if (results[0]) {
          input.value = results[0].formatted_address;
        } else {
          window.alert('No results found');
        }
      } else {
        window.alert('Geocoder failed due to: ' + status);
      }
    });
  });

  autocomplete.addListener('place_changed', function() {
    var place = autocomplete.getPlace();
    if (!place.geometry) {
      return;
    }
    if (place.geometry.viewport) {
      map.fitBounds(place.geometry.viewport);
    } else {
      map.setCenter(place.geometry.location);
    }
    marker.setPosition(place.geometry.location);
    currentLatitude = place.geometry.location.lat();
    currentLongitude = place.geometry.location.lng();
  });

我尝试了以下方法,因为我曾将它与另一个GoogleMaps代码一起使用,但这不起作用,因为它引发了一个错误:

  google.maps.event.addListener(marker, 'dragend', function(marker) {
    var country = filtered_array.length ? filtered_array[0].long_name: "";

错误:

未捕获引用错误:未定义筛选的_数组

理想情况下,我希望获得所有信息:

地址、国家名称等。