Rails6.0では、bulk insert用にinsert_all insert_all! upsert_allという3つのメソッドがActiveRecordに追加されました。 参照 Add insert_many to ActiveRecord models Rails5.2までのbulk insertはactiverecord-importというGemを使うのが主流でしたが、それに置き換わるものになりそうです。 1. insert_allメソッド insert_allメソッドは、その名の通り複数件のレコードを一括でINSERTします。 def insert_all(attributes, returning: nil, unique_by: nil) InsertAll.new(self, attributes, on_duplicate: :skip, returning: ret
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