A rails app which gets users location using HTML5 geolocation and saves to data base

问题:

Seems pretty simple but I'm struggling.

Here's what I have so far in the view. I display the location coords just to test its working. But I also want to persist on Database, hence the ajax call. Am I doing this the right way or is there an easier or better way?

<p id="demo">Click the button to get your coordinates:</p> <button onclick="getLocation()">Try It</button> <script>     var x=document.getElementById("demo");     var lat;     var long;     function getLocation()     {         if (navigator.geolocation)         {             navigator.geolocation.getCurrentPosition(showPosition);          }         else{x.innerHTML="Geolocation is not supported by this browser.";}     }     function showPosition(position)     {         lat = position.coords.latitude;         long = position.coords.longitude;         x.innerHTML="Latitude: " + lat +                 "<br>Longitude: " + long;          $.ajax({             type: 'POST',             url: 'http://localhost:3000/locations',             data: { lat: lat, long: long },             contentType: 'application/json',             dataType: 'json'          });     } </script> 

回答1:

You can try an "easier" way, use geocoder gem, this provides multiple methods in order to fetch the user location, one of them is by request.

request.location.city => Medellin request.location.country => Colombia 

You can find useful information in the following links

Railscast

Official WebPage

GitHub

回答2:

Check out this answer. Basically, just set the geolocation via a cookie and read the lat and long from the cookie in your controller.

回答3:

Here's how I did it:

controller:

def location     respond_to do |format|       format.json {         lat = params["lat"]         lng = params["lng"]         radius = 5000         type = "restraunt"         key = "-"         url = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=#{lat},#{lng}&radius=#{radius}&types=#{type}&key=#{key}"         data = JSON.load(open(url))         render json: { :data => data }       }     end   end 

routes.rb:

get "/location" => "application#location" 

view:

function getLocation(){     if (navigator.geolocation) {         navigator.geolocation.getCurrentPosition(function (position){           $.ajax({             type: 'GET',             url: '/location',             data: { lat: position.coords.latitude, lng: position.coords.longitude },             contentType: 'application/json',             dataType: 'json'             }).done(function(data){                console.log(data)             });         });     }   } 

文章来源: A rails app which gets users location using HTML5 geolocation and saves to data base