Full class name STI not included in eager loading

When eager loading a polymorphic association, it does not care about the full class name (with module) in the associated type column (attached_type in the following example).

Example:

class Shared::Address

belongs_to :attached, :polymorphic => true

end

class Company::Base

has_one :address, :as => :attached, :class_name => 'Shared::Address'

end

When saving the association the attached_type column in the addresses table says correctly Company::Base.

Eager loading the company's address however produces this query: Shared::Address::Load (0.000539) SELECT "addresses".* FROM "addresses" WHERE ("addresses"."attached_id" IN (1) and "addresses"."attached_type" = 'Base')

Attached_type is incorrectly set as "Base" where it should be "Company::Base". Therefore this results in company.address being nil.

Note that only eager load is affected. Loading the association on demand works.