quickstart

Sample - Quickstart

This sample shows how to create and use a very simple Cloud Spanner database with ActiveRecord. The database consists of two tables:

• Singers
• Albums

Albums references Singers with a foreign key.

The sample will automatically start a Spanner Emulator in a docker container and execute the sample against that emulator. The emulator will automatically be stopped when the application finishes.

This sample will:

1. Create the sample database by calling rake db:migrate. This will execute the migrations in the folder db/migrate.
2. Fill the sample database with some data by calling rake db:seed. This will execute the script in db/seeds.rb. The seed script fills the database with 10 random singers and 30 random albums.
3. Run the application.rb file. This application will:
   1. List all known singers and albums.
   2. Select a random singer and update the name of this singer.
   3. Select all singers whose last names start with an 'A'.

Run the application with the command

bundle exec rake run