I am trying to put together a directory of some of the worlds best cities around the world.
I have:
ContinentsController < ApplicationController
def index
end
def show
end
end
CountriesController < ApplicationController
def index
end
def show
end
end
CitiesController < ApplicationController
def index
end
def show
end
end
as well as:
class Continent < ApplicationRecord
has_many :countries
validates :continent_name, presence: true
end
class Country < ApplicationRecord
belongs_to :continent
has_many :cities
validates :country_name, presence: true
validates :continent_id, presence: true
end
class City < ApplicationRecord
belongs_to :continent
belongs_to :country
validates :city_name, presence: true
validates :country_id, presence: true
validates :continent_id, presence: true
end
I am using the geocoder gem. How would I geocode this? City needs to be geocoded by both country_name and city_name because cities in different parts of the world can share the same name. One example is Saint Petersburg located in both Russia and the US.
class City < ApplicationRecord
geocoded_by :city_name
after_validation :geocode, if: :city_name_changed?
end
This doesn't work in the case of Saint Petersburg as it's only geocoding the city_name, not the country_name.
Thanks a lot in advance!
You can do something like this:
class City < ApplicationRecord
geocoded_by :address
after_validation :geocode, if: :city_name_changed?
def address
"#{city_name}, #{country_name}"
end
end
The documentation shows this:
def address
[street, city, state, country].compact.join(', ')
end