Think about this simple application in RUby on Rails:
Student &lifier Teacher stretches Person. Person has 2 qualities, title &lifier age. Student has 1 extra property, grade. Teacher has 1 extra property, salary.
I wish to keep student &lifier teacher information in separate db tables. I wish to make the most of RoR's utility class
ActiveRecord:Base to retrive data of these models. Because
Person isn't likely to be instantiated, I'm able to combine it with
Teacher the following:
class Student < ActiveRecord:Base include Person end module Person end
- Is the right way of implementation?
- How you can implement this without developing a databse table known as
persons? I simply want to generate 2 tables, namely
teachers, and both must have the three qualities pointed out above.
Person doesn't have to become a model - it's really a library/module (that you simply then mixin according to your example). You'd keep that in RAILS_ROOT/lib. Your Student and Teacher classes could be models (designed to use AR::Base), and also the person can you need to be a lot of common techniques utilized by both.
Alternatively, if your little one class is much more complicated - consider "Single table inheritance" - the description which is past the scope of the answer... however, you can google for this.