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'Reversible' ->active_record_migrations [ci skip]

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Reversible method documentation moved from migrations.md  to active_record_migrations.md
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Harshad Sabne 2014-09-04 10:16:44 +05:30
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guides/source/4_0_release_notes.md
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@ -229,7 +229,7 @@ Please refer to the [Changelog](https://github.com/rails/rails/blob/4-0-stable/a
The method `change_table` is also reversible, as long as its block doesn't call `remove`, `change` or `change_default` The method `change_table` is also reversible, as long as its block doesn't call `remove`, `change` or `change_default`
* New method `reversible` makes it possible to specify code to be run when migrating up or down. * New method `reversible` makes it possible to specify code to be run when migrating up or down.
See the [Guide on Migration](https://github.com/rails/rails/blob/master/guides/source/migrations.md#using-the-reversible-method) See the [Guide on Migration](https://github.com/rails/rails/blob/master/guides/source/active_record_migrations.md#using-reversible)
* New method `revert` will revert a whole migration or the given block. * New method `revert` will revert a whole migration or the given block.
If migrating down, the given migration / block is run normally. If migrating down, the given migration / block is run normally.