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Add note about Ruby/AR compatibility and downgrading if necessary. #126

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Add note about Ruby/AR compatibility and downgrading if necessary. #126

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -14,7 +14,7 @@ Does **not** use `INSERT ON DUPLICATE KEY UPDATE` on MySQL as this only works if

70–90%+ faster than emulating upsert with ActiveRecord.

Supports MRI and JRuby.
Supports MRI (2.2+) and JRuby (9.1.14+). When used in conjunction with AR it requires AR 5+. For compatibility with older version of Ruby/AR, please use a version of Upsert < 3.

## Usage

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