Mongrations aims to be similar to ActiveRecord's data migrations, except instead of worrying about schema changes, offering a way to change data when necessary.
Example: You decide after a few weeks of running an application that you want to add timestamps, and want to display the created_at time for an application.
You could put a default timestamp into the model (and in this case that might be appropriate), but you might also just want to say, "everything needs to get a new timestamp that doesn't already have one, let's say when the US beat Canada in hockey in the Olympics."
You can add this as a plugin into your rails application.
To generate a mongration, just do:
rails generate mongration whatever_you_want_your_mongration_to_be
To run it, do
rake mongo:mongrate
Other rake tasks added have been mongo:mongrate:redo, mongo:mongrate:up, mongo:mongrate:down, mongo:mongrate:rollback.
You need Mongo and MongoMapper for this to be of any use. This is tested with rails 3.it 'll not support the older version . please use https://github.com/terrbear/mongrations for rails older version.
Released under the MIT license