If all your tables follow the _id format you can configure this at the app level with a change in environment.rb. Add this at the bottom of the file:
ActiveRecord::Base.primary_key_prefix_type = :table_name_with_underscore
If some tables have “id” and others are _id (granted that’s a messy way to design a schema) you can do this:
class Category < ActiveRecord::Base self.primary_key = “category_id” end
