Rails - Shared Database Tables between two apps

Question

We’ll be releasing shortly a companion Rails application to our existing Rails app. We will be running the companion app alongside our existing app on the same servers.

Answer 1

I think what you want is share model,not only database table,in rails table is model based.

create main rails app -->rake g model User name:string->rake db:migrate

create shared rails app 
-->rake sync:copy 
-->(DO NOT generate same model in shared app, also do not db:migrate)
-->config/generater shared
controller and router.rb file(dependend your requirement)

sync.rake(appshared/lib/tasks/)

namespace :sync do

      desc 'Copy common models and tests from Master'
      task :copy do
        source_path = '/Users/ok/github/appDataTester/appmain'
        dest_path = '/Users/ok/github/appDataTester/appshared'

        # Copy all models & tests
        %x{cp #{source_path}/app/models/*.rb #{dest_path}/app/models/}
        %x{cp #{source_path}/test/models/*_test.rb #{dest_path}/test/models/}

        # Fixtures
        %x{cp #{source_path}/test/fixtures/*.yml #{dest_path}/test/fixtures/}

        # Database YML
        %x{cp #{source_path}/config/database.yml #{dest_path}/config/database.yml}
      end
    end