Hi,
I have a question regarding to extend a subclass from an abstract class.
Suppose I have an abstract class which has 3 properties in the table:
// event.rb
class Event < ActiveRecord::Base
self.abstract_class = true
end
// event migration
class CreateEvents < ActiveRecord::Migration
def change
create_table :events do |t|
t.string :name
t.string :address
t.string :telephoneNumber
t.timestamps
end
end
end
If I want to extend this class from this event class, say a Party class:
// party.rb
class Party < Event
end
and it has 1 properties in its own party table.
My question is that is there a way in Rails so that I can carry those 3
properties from the Event class to the Party class?
The problem is that I don''t know how to carry out the parent properties
to the child class automatically. Or do I need to type all the parent
properties everytime I need to extend from the abstract class (this
sounds painful...)
Thanks,
Kahou
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On Dec 9, 6:07 am, "kahou l." <li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Hi,> If I want to extend this class from this event class, say a Party class: > > // party.rb > class Party < Event > end > > and it has 1 properties in its own party table. > > My question is that is there a way in Rails so that I can carry those 3 > properties from the Event class to the Party class? > > The problem is that I don''t know how to carry out the parent properties > to the child class automatically. Or do I need to type all the parent > properties everytime I need to extend from the abstract class (this > sounds painful...)You have a few choices: - if you do use an abstract class then yes, for each subclass you''ll need to create the table for the subclass - you could switch to single table inheritance: all the subclasses share the same table - maybe you don''t want inheritance at all, e.g. maybe your various classes should belong_to some common model Fred> > Thanks, > Kahou > > -- > Posted viahttp://www.ruby-forum.com/.-- 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-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.