Tush is a gem for migrating database rows between applications with ActiveRecord, while preserving all associations.

If you're using Rails, just add the following to your Gemfile:

gem 'tush'

Data is fed to the importer by first creating a JSON export of your rows. This is done by feeding your ActiveRecord model instances to the exporter:

model_instance1 = ActiveRecordModel.create
json_export = Tush::Exporter.new([model_instance1]).export_json

This will immediately scan each input model instance and recursively add any associated models to the export. If model_instance1 has an association with model_instance2 and model_instance2 has an association with model_instance3, all 3 model instances will be included in the export.

Using a JSON export created with Tush::Exporter, we can initialize an import, usually in a different application that shares the same ActiveRecord models,like this:

importer = Tush::Importer.new_from_json(json_export)

When we want to create the new models, and therefore importing all exported rows from our other application, we run

importer.create_models!

And to update all foreign keys to be accurate in the new application, run

importer.update_foreign_keys!

• Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet.
• Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it.
• Fork the project.
• Start a feature/bugfix branch.
• Commit and push until you are happy with your contribution.
• Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
• Tush has 100% test coverage; keep it that way.

Copyright (c) 2013 NationBuilder. See LICENSE.txt for further details.