Rails - Apr 2007 - has_many / has_one polymorphic with conditions

I''m looking for a way to make this work (I think the code is more
explanatory at this point):

## THIS WORKS
has_many :images, :as => :imageable, :dependent => :destroy, :order =>
''position ASC''

# @product.images =>  #

## THIS DOESNT
has_one :featured_image, :as => :imageable, :conditions => "position
1"

# @product.featured_image => NameError: uninitialized constant
Product::FeaturedImage

...I could always add a "featured_image" method to the product model,
but I wanted to see if this was possible first.

Thanks

J

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