rails g model location address latitude:float longitude:float rails db:migrate

<title>Gcode</title> <%= csrf_meta_tags %>

<%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

<% flash.each do |name, msg| %> <%= content_tag :div, msg, :id => "flash_#{name}" %> <% end %>

<%= yield %>

geocoder version : 1.4.1

gem 'geocoder'

rails g controller locations

class LocationsController < ApplicationController def index if params[:search].present? @locations = Location.near(params[:search], 50, :order => :distance) else @locations = Location.all end end

def show @location = Location.find(params[:id]) end

def new @location = Location.new end

def create @location = Location.new(allowed_params) if @location.save redirect_to @location, :notice => "Successfully created location." else render :new end end

def edit @location = Location.find(params[:id]) end

def update @location = Location.find(params[:id]) if @location.update_attributes(allowed_params) redirect_to @location, :notice => "Successfully updated location." else render :edit end end

def destroy @location = Location.find(params[:id]) @location.destroy

redirect_to locations_url, :notice => "Successfully destroyed location."

end

private

def allowed_params params.require(:location).permit(:id, :address, :latitude, :longitude) end end

class Location < ApplicationRecord geocoded_by :address # can also be an IP address after_validation :geocode # auto-fetch coordinates end

locations/_form.html.erb:

<%= form_for @location do |f| %>

<%= f.label :address %>
<%= f.text_field :address %>

<%= f.label :latitude %>
<%= f.text_field :latitude %>

<%= f.label :longitude %>
<%= f.text_field :longitude %>

<%= f.submit %>

<% end %>

edit.html.erb:

<%= render 'form' %>

<%= link_to "Show", @location %> | <%= link_to "View All", locations_path %>

index.html.erb:

<%= form_tag locations_path, :method => :get do %>

<%= text_field_tag :search, params[:search] %> <%= submit_tag "Search Near", :name => nil %>

<% end %> <% for location in @locations %> <% end %>

Address	Latitude	Longitude
<%= location.address %>	<%= location.latitude %>	<%= location.longitude %>	<%= link_to "Show", location %>	<%= link_to "Edit", edit_location_path(location) %>	<%= link_to "Destroy", location, :confirm => 'Are you sure?', :method => :delete %>

<%= link_to "New Location", new_location_path %>

new.html.erb:

<%= render 'form' %>

<%= link_to "Back to List", locations_path %>

show.html.erb:

Address: <%= @location.address %>

Latitude: <%= @location.latitude %>

Longitude: <%= @location.longitude %>

<%= image_tag "http://maps.google.com/maps/api/staticmap?size=450x300&sensor=false&zoom=16&markers=#{@location.latitude}%2C#{@location.longitude}" %>

Nearby locations

<% for location in @location.nearbys(10) %>
• <%= link_to location.address, location %> (<%= location.distance.round(2) %> miles)
<% end %>

<%= link_to "Edit", edit_location_path(@location) %> | <%= link_to "Destroy", @location, :confirm => 'Are you sure?', :method => :delete %> | <%= link_to "View All", locations_path %>

routes.rb:

resources :locations

You can now create locations.

https://github.com/alexreisner/geocoder

Converting IP address to Location

rails g model download ip rails db:migrate

class Download < ApplicationRecord geocoded_by :ip after_validation :geocode

end

Download.create(ip: '209.249.19.173') (0.1ms) begin transaction (0.1ms) rollback transaction NoMethodError: undefined method `latitude=' for #Download:0x007ffc5cdccd18

rails db:drop

class CreateDownloads < ActiveRecord::Migration[5.0] def change create_table :downloads do |t| t.string :ip t.float :latitude t.float :longitude

  t.timestamps
end

end end

rails db:migrate

Download.create(ip: '209.249.19.173') (0.0ms) begin transaction Geocoding API not responding fast enough (use Geocoder.configure(:timeout => ...) to set limit). SQL (0.4ms) INSERT INTO "downloads" ("ip", "created_at", "updated_at") VALUES (?, ?, ?) [["ip", "209.249.19.173"], ["created_at", 2017-01-25 19:38:45 UTC], ["updated_at", 2017-01-25 19:38:45 UTC]] (2.5ms) commit transaction => #<Download id: 1, ip: "209.249.19.173", latitude: nil, longitude: nil, created_at: "2017-01-25 19:38:45", updated_at: "2017-01-25 19:38:45">

Add the config/initiazers/geocoder.rb:

Geocoder::Configuration.timeout = 15

Download.create(ip: '209.249.19.173') (0.1ms) begin transaction SQL (0.5ms) INSERT INTO "downloads" ("ip", "latitude", "longitude", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?) [["ip", "209.249.19.173"], ["latitude", 37.8381], ["longitude", -122.1026], ["created_at", 2017-01-25 19:40:03 UTC], ["updated_at", 2017-01-25 19:40:03 UTC]] (2.6ms) commit transaction => #<Download id: 2, ip: "209.249.19.173", latitude: 37.8381, longitude: -122.1026, created_at: "2017-01-25 19:40:03", updated_at: "2017-01-25 19:40:03">

$ geocode 37.8381, -122.1026 Latitude: 37.8375726 Longitude: -122.1023373 Full address: Cross Path, Moraga, CA 94556, USA City: Moraga State/province: California Postal code: 94556 Country: United States Google map: http://maps.google.com/maps?q=37.8375726,-122.1023373

THe address private method in this example: https://github.com/alexreisner/geocoder/blob/master/examples/reverse_geocode_job.rb shows how to convert coordinates to an address.

$rails c Loading development environment (Rails 5.0.1)

Geocoder.address([37.8381, -122.1026]) => "Cross Path, Moraga, CA 94556, USA" Geocoder.address([37.7618242,-122.39858709999999]) => "324 Arkansas St, San Francisco, CA 94107, USA"

https://www.freemaptools.com/convert-us-zip-code-to-lat-lng.htm