A tiny mongoid extension to provide the touch method known from ActiveRecord to Mongoid::Document.

Use Bundler/Gemfile, add gem "mongoid_touch" right after your added mongoid.

The method .touch can have an optional parameter for your custom Time based field, otherwise it will try to use the updated_at field (include Mongoid::Timestamps in your model).

Use .touch! if you want to get exceptions if touching fails.

Now you can use:

my_model_instance.touch
my_model_instance.touch! # will raise errors if touching fails.

This will update the updated_at field if present.

my_model_instance.touch(:modified_at)
my_model_instance.touch(:modified_at) # will raise errors if touching fails.

This will update the custom field modified_at if present.

If the corresponding field is not present, mongoid_touch will raise a Mongoid::Errors::MissingField.

If the object is frozen, an exception of Mongoid::Errors::FrozenInstance is thrown.

If the underlying update_attribute doesn't return true, Mongoid::Errors::DocumentNotUpdated is thrown (unless mongoid itself throws an error).

• 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.
• Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

Copyright (c) 2011 Christoph Grabo. See LICENSE.txt for further details.