C:projects>rails new libray

default: &default
  adapter: sqlite3
  pool: 5
  timeout: 5000

development:
  <<: *default
  database: db/development.sqlite3

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  <<: *default
  database: db/test.sqlite3

production:
  <<: *default
  database: db/production.sqlite3

development:
   adapter: mysql
   database: library_development
   username: root
   password: 1234
   host: localhost

test:
   adapter: mysql
   database: library_test
   username: root
   password: 1234
   host: localhost

production:
   adapter: mysql
   database: library_production
   username: root
   password: 1234
   host: localhost

C:projects>library>rails generate model book