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Changeset [3d6eea0221f0092cb3c3270c2a9bdf31745d1b2d] by Michael Koziarski

Revision 3d6eea0221f0092cb3c3270c2a9bdf31745d1b2d, committed by Michael Koziarski · November 7th, 2010 @ 09:16 PM

Update the validates_uniqueness_of documentation to tell you to use a unique index.

The other options mentioned were not good ideas and disclaimed as such in the documentation.
https://github.com/rails/rails/commit/3d6eea0221f0092cb3c3270c2a9bd...