Hello.
I have a question to inheritance in Rails(2.3.4).
I have this three models.
class Vehicle < ActiveRecord::Base
end
class Car < Vehicle
end
class RallyCar < Car
end
And this Migration:
class CreateVehicles < ActiveRecord::Migration
def self.up
create_table :vehicles do |t|
t.string :name
t.string :brand
t.string :type
t.timestamps
end
Vehicle.create(:name =>'Demo Vehicle', :brand => 'unknown')
Vehicle.create(:name => 'Demo2 Vehicle', :brand => 'unknown')
Car.create(:name => 'My Car', :brand => 'Mercedes')
Car.create(:name => 'My Second Car', :brand => 'VW')
RallyCar.create(:name => 'My Rally Car', :brand => 'Ford')
RallyCar.create(:name => 'My Second Rally Car', :brand => 'Toyota')
end
def self.down
drop_table :vehicles
end
end
This model structur has curious behavior.
>> Vehicle.count
=> 6
>> Car.count
=> 2
>> RallyCar.count
=> 2
>> Car.count
=> 4
I have the same Problem in find.
Car.find(:all) returns two Records
RallyCar.count
Car.find(:all) returns four Records
Can anyone help me.
Thanks,
Michael
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