CacheAssociations
CacheAssociations is a simple cache implementation to make Low-Level caching collaborate with Association caching.
Installation
Add this line to your application's Gemfile:
gem 'cache_associations'
And then execute:
$ bundle
Or install it yourself as:
$ gem install cache_associations
Usage
class User < ApplicationRecord
include CacheAssociations
has_one :profile
cache_association :profile do
# put your cache name here
[self.class.name, id, 'profile', update_at.to_i]
end
end
class Profile < ApplicationRecord
belongs_to :user, touch: true
end
The cache_association
defines a method cached_profile
to fetch data from the cache store.
You may also specify additional options via the options argument, it's the same as ActiveSupport::Cache::Store#fetch
,
such as setting :expires_in
will set an expiration time on the cache.
And cache_association
accepts an optional block to define the cache name, it's [self.class.name, id, name, updated_at.to_i]
in default.
irb> u = User.take
irb> u.cached_profile # fetch from the cache store
irb> u.profile # fetch the cached version
irb> u.profile.reload # refetch from the database
Profile Load (1.4ms) SELECT "profiles".* FROM "profiles" WHERE "profiles"."user_id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
You may customize what the data you cached, the cached method accepts an optional block that determines how to cache data. But it will break the original association, so you should be careful with this feature.
irb> u = User.take
irb> u.cached_profile do "gotcha" end
=> "gotcha"
irb> u.profile # it breaks
(Object doesn't support #inspect)
=>
irb> u.profile.reload # restore
Profile Load (1.4ms) SELECT "profiles".* FROM "profiles" WHERE "profiles"."user_id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
Development
After checking out the repo, run bin/setup
to install dependencies. You can also run bin/console
for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install
. To release a new version, update the version number in version.rb
, and then run bundle exec rake release
, which will create a git tag for the version, push git commits and tags, and push the .gem
file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/FX-HAO/cache_associations. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
License
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the CacheAssociations project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.