rails plugin new <project_name> -T -d postgresql --dummy-path=spec/dummy --skip-turbolinks --skip-spring --mountable
-Tskips the creation of the test directory and the use ofTest::Unit--dummy-path=spec/dummysets up your dummy app in a spec directory--skip-turbolinks&--skip-springcreates a project that does not use turbolinks or spring--mountablecreates a "mountable" and namespace-isolated engine.
- In Gemfile: