Question

I come from an ASP.NET MVC background and am currently going through the following Rails tutorial: http://guides.rubyonrails.org/getting_started.html

I have created a “Post” model which contains some instance variables, but they do not seem to have been defined in the model. They must come from somewhere else. Where are they defined?

Answer 1

Googled “activerecord model” and this was in the top result:

Active Record objects don’t specify their attributes directly, but rather infer them from the table definition with which they’re linked. Adding, removing, and changing attributes and their type is done directly in the database. Any change is instantly reflected in the Active Record objects. The mapping that binds a given Active Record class to a certain database table will happen automatically in most common cases, but can be overwritten for the uncommon ones.