This application consists of a contact list which will be shown on a map.
Shell commands (You may execute the whole script in one go):
echo Create new rails structure
rails new Gmaps4Rails
cd Gmaps4Rails
pause Create scaffold for the people model and migrate the database
rails g scaffold contact firstname:string lastname:string address:string zip:string city:string country:string
rake db:migrate
open http://localhost:3000/contacts
say Please reload your web browser in a few moments &
rails server
echo Done :-)
Shell commands
# Add the the gem to the Gemfile and use the bundle command to install it
echo "gem 'gmaps4rails'" >> Gemfile
bundle install
# Run the provided gmaps4rails generator
rails generate gmaps4rails:install
Migrate the contact model to have the required parameters
rails g migration AddLongLatToContacts latitude:float longitude:float gmaps:boolean
rake db:migrate
Change the model contact.rb to this:
class Contact < ActiveRecord::Base
attr_accessible :firstname, :lastname, :address, :zip, :city, :country
acts_as_gmappable
def gmaps4rails_address
"#{self.address}, #{self.zip} #{self.city}, #{self.country}"
end
end
Change the body part of your layout as follows
<body>
<%= yield :head %>
<%= yield %>
<%= yield :scripts %>
</body>
Add a new action to your contacts_controller.rb:
def map
@json = Contact.all.to_gmaps4rails
end
Add a new file map.html.erb to the contact's view directory and add the following line to it:
<%= gmaps4rails(@json) %>
Now we create a new custom route to our routes.rb by adding the following line:
match 'map' => "contacts#map"
Now we need to add a few contacts which then magically appear on our map.
- Gem Google-Maps-for-Rails on Github