yes, the Animal contains all the field and if you create a Feline instance as feline, seeing_eye_dog will be left empty.
On Tue, Mar 30, 2010 at 3:19 PM, brianp <[email protected]> wrote: > I've done some reading on Single Table Inheritance. > > I think I need something a little more though. > > Classic example. > > class Animal < ActiveRecord::Base > // db fields: > name: string > age: int > type: string > breed: string > end > > class Feline < Animal > // db fields: > whisker_count: int > end > > class Canine < Animal > // db fields: > seeing_eye_dog: boolean > end > > So how do Canine and Feline inherit the fields from Animal although > they don't require each others fields. Does the Animals table just > contain all the fields but value can be null and only returns the > available fields for that Model? > > Cheers, > > -- > 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 [email protected]. > To unsubscribe from this group, send email to > [email protected]<rubyonrails-talk%[email protected]> > . > 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
