...migrations are wrapped in a transaction. If the database does not support this (for example MySQL) then when a migration fails the parts of it that succeeded will not be rolled back. You will have to rollback the changes that were made by hand, and rerun the migration.
- Active Record supports the following database column types:
- :binary :boolean
- :date
- :datetime
- :decimal
- :float
- :integer
- :primary_key
- :string
- :text
- :time
- :timestamp
- add_column
- add_index
- add_timestamps
- create_table
- remove_timestamps
- rename_column
- rename_index
- rename_table
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