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When to use scoped models?
Refactoring CSV Uploads with ActiveModel::Model Download , you make a scoped class
When should we use scoped class like this?
And, how does it different from
rails generate model user/import?
I'd say any time you're making supporting classes. For example
User::Import should be a separate class from
User to provide the functionality we want, but at the same time it's really closely tied together with
User. That's usually a good sign it deserves being in a module like that.
If you use the generate model functionality, that would actually create a full ActiveRecord object and database table. In this case, I don't need to store the uploaded CSV files, so using an ActiveRecord model isn't necessary. We use
ActiveModel::Model to give a regular Ruby class much of the same functionality as an
ActiveRecord::Base object would have. That's what makes it easy to create a