class ActiveRecord::ThroughNestedAssociationsAreReadonly

:nodoc:

def initialize(owner = nil, reflection = nil)

:nodoc: 
def initialize(owner = nil, reflection = nil)
  if owner && reflection
    super("Cannot modify association '#{owner.class.name}##{reflection.name}' because it goes through more than one other association.")
  else
    super("Through nested associations are read-only.")
  end
end