class ActiveRecord::CompositePrimaryKeyMismatchError

def initialize(reflection = nil)
  if reflection
    if reflection.has_one? || reflection.collection?
      super("Association #{reflection.active_record}##{reflection.name} primary key #{reflection.active_record_primary_key} doesn't match with foreign key #{reflection.foreign_key}. Please specify query_constraints, or primary_key and foreign_key values.")
    else
      super("Association #{reflection.active_record}##{reflection.name} primary key #{reflection.association_primary_key} doesn't match with foreign key #{reflection.foreign_key}. Please specify query_constraints, or primary_key and foreign_key values.")
    end
  else
    super("Association primary key doesn't match with foreign key.")
  end
end