join table attributes piggy backed with has_many through

Aryk Grosz wrote:

Is there anyway to get the join table attributes to show up as attributes on the has_many association when the has_many is eager loaded. I think the eager loaded part is the gotcha to all this.

For example, if I have book.contributors, and the join table "contributions" had a contribution_date on it. How can I get the date onto the contributors' objects.

That way I can do book.contributors[0].contribution_date. Is it not possible to do when its included?

The attributes should be there if you're using has_and_belongs_to_many.

But if you're using has_many_through, eager load like this

  book = Book.find(..., :include => {:contributions => :contributor})

Then access like this:

  book.contributions[0].contribution_date   book.contributions[0]