rails generator syntax
1 2 rails projectname
// generate migration.
1 2 ruby script/generate migration migration_name 3 ruby script/generate migration add_price
// generate model
// we can give a list of columns and types
// :string, :text, :integer, :decimal, :float, :date, ...
1 2 ruby script/generate model model_name 3 ruby script/generate model user name:string hashed_password:string salt:string
// generate controller
1 2 ruby script/generate controller controller_name method_name(s) 3 ruby script/generate controller store index
// generate scaffold
1 2 ruby script/generate scaffold model_name controller_name 3 ruby script/generate scaffold product admin