cache_depends_on

A better way of controlling cache dependencies than belongs_to :product, touch: true

Example

class Author < ActiveRecord::Base
  has_many :artciles

  cache_depends_on :articles
end

class Artcile < ActiveRecord::Base
  belongs_to :rating

  cache_depends_on :rating
end

class Rating < ActiveRecord::Base
  has_one :article
end

CacheDependsOn can deal with any kinds of ActiveRecord associations.

...console/SQL log...

Important notes

Cache invalidation always happens outside transaction

...why...

Each row will be updated only ones per transaction if properly configured

If an Author has five articles and all of them are updated within a transaction, the Author will be updated only once.

...why it is important... ...how to establish 'ideal relationships' between ActiveRecord models.

How to install

Add the following to your Gemfile:

gem 'cache_depends_on'

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/veeqo/cache_depends_on.

Sponsored by Veeqo