Rails: Gmaps4Rails & Geocoder - setup - ruby-on-rails

Question

Trying to figure out how to display a map in my rails 4 app show page.
I have a model called addresses. This is the address.rb file:
class Address < ActiveRecord::Base
geocoded_by :full_address # can also be an IP address
before_save :capitalise_address
before_save :upcase_zip
# --------------- associations
belongs_to :addressable, :polymorphic => true
# --------------- scopes
# --------------- validations
validates_presence_of :unit, :street, :zip, :country
# --------------- class methods
def first_line
[unit, street].join(' ')
end
def middle_line
if self.building.present?
end
end
def last_line
[city, region, zip].join(' ')
end
def country_name
self.country = ISO3166::Country[country]
country.translations[I18n.locale.to_s] || country.name
end
def address_without_country
[self.first_line, middle_line, last_line].compact.join(" ")
end
def full_address
[self.first_line, middle_line, last_line, country_name.upcase].compact.join("\n")
end
# --------------- callbacks
# after_validation :geocode, if self.full_address.changed?
# --------------- instance methods
# --------------- private methods
protected
def upcase_zip
zip.upcase
end
def capitalise_address
["building", "street", "city", "region", "country" ].each do | name |
self.attributes[name] = self.attributes[name].capitalize
end
end
end
I have added geocoded, gmap4rails, underscore gems to my gem file.
In my addresses controller I have:
class AddressesController < ApplicationController
before_action :set_address, only: [:show, :edit, :update, :destroy]
respond_to :html, :xml, :json
def index
#addresses = Address.all
respond_with(#addresses)
end
def show
respond_with(#address)
end
def new
#address = Address.new
respond_with(#address)
end
def edit
end
def create
#address = Address.new(address_params)
#address.save
respond_with(#address)
end
def update
#address.update(address_params)
respond_with(#address)
end
def destroy
#address.destroy
respond_with(#address)
end
private
def set_address
#address = Address.find(params[:id])
end
def address_params
params[:address].permit(:unit, :building, :street, :city, :region, :zip, :country)
end
end
In my address show page I have:
<script src="//maps.google.com/maps/api/js?v=3.13&sensor=false&libraries=geometry" type="text/javascript"></script>
<script src="//google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/2.0.14/src/markerclusterer_packed.js" type="text/javascript"></script>
<div class="containerfluid">
<div class="row">
<div class="col-md-12">
<div style='width: 800px;'>
<div id="map" style='width: 800px; height: 400px;'>
</div>
</div>
<div class="addressbacking">
<%= #address.full_address %>
<div style='width: 800px;'>
<div id="one_marker" style='width: 800px; height: 400px; z-index:1'></div>
</div>
</div>
</div>
</div>
</div>
</div>
<script type="text/javascript">
handler = Gmaps.build('Google');
handler.buildMap({ provider: {}, internal: {id: 'map'}}, function(){
markers = handler.addMarkers(<%=raw #hash.to_json %>);
handler.bounds.extendWith(markers);
handler.fitMapToBounds();
});
</script>
I am trying to follow this set up tutorial, which suggests adding this to my controller:
def index
#users = User.all
#hash = Gmaps4rails.build_markers(#users) do |user, marker|
marker.lat user.latitude
marker.lng user.longitude
marker.title user.title
end
end
Which I do (although I don't know what it means or if its the cause of my problem), so that my index action in the controller is:
def index
#addresses = Address.all
respond_with(#addresses)
#hash = Gmaps4rails.build_markers(#users) do |user, marker|
marker.lat user.latitude
marker.lng user.longitude
marker.title user.title
end
end
I have a form partial in my views which has input elements for each of the strong params showing at the bottom of my controller.
When I try this, a map renders, but its not the address that i entered in my form.
How do I fix this? I don't have longitude and latitude attributes in my address table.

Answer 1

You geocoded class Address, so it has latitude and longitude method. Was User class geocoded too?
def index
#addresses = Address.all
#hash = Gmaps4rails.build_markers(#addresses) do |address, marker|
marker.lat address.latitude
marker.lng address.longitude
end
end
Be sure to add params to addresses:
class AddLatitudeAndLongitudeToAddress < ActiveRecord::Migration
def change
add_column :addresses, :latitude, :float
add_column :addresses, :longitude, :float
end
end

Answer 2

Let's check app/assets/javascripts/addresses.coffee
For example:
class RichMarkerBuilder extends Gmaps.Google.Builders.Marker
create_marker: ->
options = _.extend #marker_options(), #rich_marker_options()
#serviceObject = new RichMarker options
rich_marker_options: ->
marker = document.createElement("div")
marker.setAttribute 'class', 'marker_container'
marker.innerHTML = #args.marker
{ content: marker }
handler = Gmaps.build 'Google', { builders: { Marker: RichMarkerBuilder} }
handler.buildMap { provider: {}, internal: {id: 'map'} }, ->
markers = handler.addMarkers([
{"lat": 0, "lng": 0, 'marker': '<span>Here!</span>'}
])
handler.bounds.extendWith(markers)
handler.fitMapToBounds()
In your model add
geocoded_by :full_address
after_validation :geocode