At the bottom of p16 you have a bullet point list of actions the setup script will take. One reads: “Run
rails db:prepare—this creates the database”
On the next page, you write, “You should also run
rails db:seed to get sample data in the database.” The command
rails db:prepare takes care of the seeding step for you! In fact, it first checks to see if the database already exists. If not, it will create one before proceeding, if so, it skips that step and goes right to running the migrations and seeding the DB.