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Migrations for MongoMapper
branch: master

db namespace causes collisions with ActiveRecord in mongo_mapper 0.8.…

…2. Renamed to mongo namespace.
latest commit f9e8b23ae4
Jonathan jonbell authored committed



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."


To generate a mongration, just do:

script/generate mongration whatever_you_want_your_mongration_to_be

To run it, do

rake db:mongrate

Other rake tasks added have been db:mongrate:redo, db:mongrate:up, db:mongrate:down, db:mongrate:rollback.


You need Mongo and MongoMapper for this to be of any use.

Also, this has only been tested on Rails 2.3.5.


This is not ready for production

I just adapted this, at 10:30PM, half watching the Olympics. I'm not responsible for any damage to your data, your mongodb, your bongos, your cat, your wife, or your kids as a result of installing this plugin.

Give it a few days. Please report bugs.


Original code is from Rails 2.3.5 and ActiveRecord 2.3.5, now adapted to work with MongoMapper.


Released under the MIT license

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