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【Rails】where.notを連結するしないでクエリが異なる

Posted at

下2つは同じクエリを吐き出すと勘違いしていたので備忘録。

where.not(tag: '', user_id: 1)

where.not(tag: '').where.not(user_id: 1)

where.notを複数連結

画像左

Post.where.not(tag: "Ruby").where.not(user_id: 1)
=> SELECT `posts`.* FROM `posts` WHERE `posts`.`tag` != 'Ruby' AND `posts`.`user_id` != 1

連結しない

画像右

Post.where.not(tag: "Ruby", user_id: 1)
=> SELECT `posts`.* FROM `posts` WHERE NOT (`posts`.`tag` = 'Ruby' AND `posts`.`user_id` = 1)

math.jpeg

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