On 3 May 2012 15:28, Mauro <mrsan...@gmail.com> wrote: > 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, Cat.all having > automaticaly all dogs, all cats, etc. > But what if I want to add some other attributes to Dog or Cat classes? > In the example above all classes have only name attribute. > What if I want inherit from Animal extending attributes and adding, > for example, an attribute like canFly? for inherited classes? >
Hi, You can add columns to the animals table that only some classes use. IMHO this is not a nice solution. I have written the SuperSTI gem that I think offers a nicer solution. Read about it at http://www.ihid.co.uk/projects/super_sti and https://github.com/ihid/super_sti Feel free to email me personally to discuss it further. Jeremy Walker http://www.ihid.co.uk > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
