30 Nov '17, 1pm

なるほどなー。uniqueness貼るやつ、DB上もユニークインデックスはると思うのでインデックス効きそうな感じするけどどうなんだろ/本当にあったRailsの怖い話 #rails #ruby https://t.co/J2f5Dxwx9N @S…

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