Rails generators

Question 1

What is the difference between the generation model/scaffold/resource?

Answer 1

models generate model and migration
rails g model Test name:text
# resource generate model, migration, controller and resource routing
rails g resource Test name:text
# scaffold generate model, migration, controller and routing with CRUD actions and view
rails g scaffold Test name:text

Question 2

How to generate a model inside a module?

Answer 2

rails g model admin/user