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Hello. I''ve read about examples on inheritance with rails. Here is an example: http://juixe.com/techknow/index.php/2006/06/03/rails-single-table-inheritance/ The way is to add a type field in the table. So if I have an Animal class with an attribute name, I can inherit from this class like: Dog < Animal, Cat < Animal, and so on. With the type field in the table I can do Dog.all,

Hi, I have a Question model where the answer to the question can have multiple db type (integer, string, boolean, ...). I would like to know if you have a better solution than this one: Question: question:string answer_type:string AnsweredQuestion: question_id:integer answer:text answer_type:string Ex: AnsweredQuestion.create(:question => 1, :answer => ''5'',

I have problems on a simple design problem. I have many companies. Each company have one or more commercial activity. Activities types are: ecommerce, local unit, television, automatic vending machines, and so on. Company may have one or more ecommerce activity or one or more local unit activity, one ormore vending machines, etc. How can I model this scenario? Company has_many ecommerce has_many