回答編集履歴
1
ちょい修正
test
CHANGED
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@@ -1 +1 @@
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1
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-
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1
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+
carrierwaveのドキュメント[How to: Use a timestamp in file names](https://github.com/carrierwaveuploader/carrierwave/wiki/How-to%3A-Use-a-timestamp-in-file-names)が参考になると思います
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