javascript - 提交前将 Lat Lng 值设置到隐藏字段中

Question

我正在使用 Google Maps Api(包括自动完成)让用户将地址写入表单字段，然后查找所输入地址的纬度和经度值。

现在，我想将这些值发送回表单(隐藏字段)以提交到数据库。后端已全部设置完毕，我只是不确定如何在客户端上进行操作。我很感谢您的帮助!

我的代码 ruby :

<div id="form>
  <%= f.text_field :location, onFocus: "geolocate", id: "autocomplete" %>
  <%= hidden_field_tag :latitude, id: "lat" %>
  <%= hidden_field_tag :longitude, id: "lng" %>
  <%= f.button :submit, class: "btn" %>
</div>

Javascript:

function codeAddress() {
    var address = document.getElementById("autocomplete").value;
    // next line creates asynchronous request
    geocoder.geocode( { 'autocomplete': address}, function(results, status) {
      // and this is function which processes response
      if (status == google.maps.GeocoderStatus.OK) {
        $("#lat").val(results[0].geometry.location.lat());
        $("#lng").val(results[1].geometry.location.lng());
      } else {
        alert("Geocode was not successful for the following reason: " + status);
      }
    });
  }

  var placeSearch, autocomplete;

  function initialize() {
    autocomplete = new google.maps.places.Autocomplete(
        (document.getElementById('autocomplete')),
        { types: ['geocode'] });
  }

  function fillInAddress() {
    var place = autocomplete.getPlace();

    for (var component in componentForm) {
      document.getElementById(component).value = '';
      document.getElementById(component).disabled = false;
    }
  }

function geolocate() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(function(position) {
      var geolocation = new google.maps.LatLng(
          position.coords.latitude, position.coords.longitude);
      autocomplete.setBounds(new google.maps.LatLngBounds(geolocation,
          geolocation));
    });
  }
}

Answer 1

如果您想使用 $("#form").submit(); docs 执行成功的地理位置操作，则可以设置回调以提交表单。 .

if (status == google.maps.GeocoderStatus.OK) {
    $("#lat").val(results[0].geometry.location.lat());
    $("#lng").val(results[1].geometry.location.lng());
    $("#form").submit();
}