我想在rails表单中使用google places autocomplete。
我正在使用rails v5.1.1
我正在关注这篇文章：https://developers.google.com/maps/documentation/javascript/examples/places-searchbox
我的应用程序布局如下：
...lots of layout code
<% yield %>
<!-- this is to yield for additional page specific JS from other external sources -->
<%= yield :additional_page_js %>
<%= yield :additional_js %>
</body>
然后我有一个名为journeys / show.html.erb的视图：
<div class="container">
<div class="col-xs-6">
<div class="col-xs-6">
<h4>Let's make a new leg</h4>
<%= simple_form_for(leg, html: { class: 'form-horizontal' }) do |f| %>
<%= f.error_notification %>
<%= f.input :journey_id, as: :hidden %>
<%= f.input :name, label: 'Give your leg a name', error: 'A name is mandatory - name it!' , hint: 'Something friendly...' %>
<%= f.simple_fields_for :origin do |p| %>
<%= p.input :name , label: 'Origin', error: 'An origin is mandatory - where did you begin?' , hint: 'Where did you begin?', :input_html => { :id => "pac-input", :class => "controls" } %>
<% end %>
<%= f.simple_fields_for :destination do |n| %>
<%= n.input :name , label: 'Destination', error: 'A destination is mandatory - where did you end up?' , hint: 'Where did you end up?'%>
<% end %>
<%= f.button :submit , "Lets go!" %>
<% end %>
</div>
<div class="col-xs-6">
<div id="origin_map"></div>
</div>
</div>
<%= content_for :additional_page_js do %>
<%= javascript_include_tag "controllers/journeys/journeys" %>
<% end %>
<%= content_for :additional_js do %>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAP927IOgIj5GshStjMVfGTfMzHj2Dr1uo&libraries=places&callback=initMapAutocomplete"></script>
<% end %>
请注意，content_for'additional_page_js'产量具有以下内容（即journeys.js）：
function initMapAutocomplete() {
var map = new google.maps.Map(document.getElementById('origin_map'), {
center: {lat: -33.8688, lng: 151.2195},
zoom: 13,
mapTypeId: 'roadmap'
});
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function() {
searchBox.setBounds(map.getBounds());
});
var markers = [];
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
markers.forEach(function(marker) {
marker.setMap(null);
});
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function(place) {
if (!place.geometry) {
console.log("Returned place contains no geometry");
return;
}
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
markers.push(new google.maps.Marker({
map: map,
icon: icon,
title: place.name,
position: place.geometry.location
}));
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
});
map.fitBounds(bounds);
});
}
content_for additional_js具有以下内容：
journeys.css的css具有以下内容：
#description {
font-family: Roboto;
font-size: 15px;
font-weight: 300;
}
#infowindow-content .title {
font-weight: bold;
}
#infowindow-content {
display: none;
}
#map #infowindow-content {
display: inline;
}
.pac-card {
margin: 10px 10px 0 0;
border-radius: 2px 0 0 2px;
box-sizing: border-box;
-moz-box-sizing: border-box;
outline: none;
box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
background-color: #fff;
font-family: Roboto;
}
#pac-container {
padding-bottom: 12px;
margin-right: 12px;
}
.pac-controls {
display: inline-block;
padding: 5px 11px;
}
.pac-controls label {
font-family: Roboto;
font-size: 13px;
font-weight: 300;
}
#pac-input {
background-color: #fff;
font-family: Roboto;
font-size: 15px;
font-weight: 300;
margin-left: 12px;
padding: 0 11px 0 13px;
text-overflow: ellipsis;
width: 400px;
}
#pac-input:focus {
border-color: #4d90fe;
}
#title {
color: #fff;
background-color: #4d90fe;
font-size: 25px;
font-weight: 500;
padding: 6px 12px;
}
#target {
width: 345px;
}
当页面加载时 - pac-input字段没有显示 - 实际上它根本不在生成的HTML中：
<%= p.input :name , label: 'Origin', error: 'An origin is mandatory - where did you begin?' , hint: 'Where did you begin?', :input_html => { :id => "pac-input", :class => "controls" } %>
我没有得到javascript错误，我在服务器日志中没有出现rails错误。
如果我从journeys.js中删除了javascript - 原始表单字段显示正常工作。我相信导致该字段“消失”的那一行来自journeys.js：
var searchBox = new google.maps.places.SearchBox(input);
请有人帮我这个谷歌地方搜索自动完成字段工作！
答案 0 :(得分：0)
问题原来有两个组成部分。
1 /地图div没有大小，因此没有出现。通过更改html以给它一个大小 - 在页面上加载现在渲染的地图。
<div id="origin_map" style='width: 100%; height: 30rem;'></div>
2 /然后我意识到我的输入字段并没有消失 - 而是被移到了地图的顶部。通过评论这个重新定位的行 - 我能够通过工作谷歌地方自动完成来修复我的表单。
map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);