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pinzolo/get_associated_attribute_names.rb

Last active August 29, 2015 14:05
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アソシエーションで定義された属性の名前を取得する
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get_associated_attribute_names.rb
user = User.first
# association で定義された属性の名前を取得
user.reflections.keys
# belongs_to で定義された属性の名前を取得
user.reflections.select { |_, ref| ref.macro == :belongs_to }.keys
# through 経由で定義された属性の名前を取得
user.reflections.select { |_, ref| ref.is_a?(ActiveRecord::Reflection::ThroughReflection) }.keys
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