## DataMapper equivalent of ActiveRecord's reflect_on_all_associations method, but only so far as my particular use needed it

  def reflect_on_all_associations
    # Datamapper, you're crazy...
    relationships.map { |name, relationship|
      if relationship.options[:min].nil?
        macro = :belongs_to
        if relationship.options[:class_name]
          # In a belongs_to, the side with the class name uses
          # the parent model, but child key for the foreign key...
          class_name = relationship.parent_model.to_s
          primary_key_name = relationship.child_key.entries.first.name
        else
          class_name = relationship.child_model.to_s
          primary_key_name = relationship.parent_key.entries.first.name
        end
      else
        macro = :has_one
        if relationship.options[:class_name]
          # but on the has_one side, it's the *child* model that
          # uses the child key for the foreign key.  Weirdness.
          class_name = relationship.child_model.to_s
          primary_key_name = relationship.child_key.entries.first.name
        else
          class_name = relationship.parent_model.to_s
          primary_key_name = relationship.parent_key.entries.first.name
        end
      end
      OpenStruct.new(
        :name => name,
        :class_name => class_name,
        :primary_key_name => primary_key_name,
        :macro => macro
      )
    }
  end