can't dup NilClass - Error

Why are you marking the Child as unloadable? Is there a good reason for this? if not, I'd remove.

Rails API says "Unloadable constants are removed each time dependencies are cleared."

Does the error happen when you change it to:

class Child < Parent
  has_many :parents, :foreign_key => "child"
end

And, I may be overstepping, but this seems more standard:

class Child
  belongs_to :parent
end

class Parent
  has_many :children, :dependent=>:destroy
end

Related