Ruby on Rails provides a
model generator you can use to create ActiveRecord models. Simply use
rails generate model and provide the model name.
$ rails g model user
In addition to the model file in
app/models, the generator will also create:
You can also generate some fields for the model when generating it.
$ rails g model user email:string sign_in_count:integer birthday:date
This will create the columns email, sign_in_count and birthday in your database, with the appropriate types.