Module: KeyCache::Cache

Extended by:

ActiveSupport::Concern

Defined in:

lib/key_cache/cache.rb

Overview

KeyCache::Cache

Description

This modules is an Rails Concern which provides a simple mechanism for caching values in redis.

Arguments

key: key value to store the location. Use "/" to define segments and ":"
     to define segements that you want to be replaced by values returned
     from methods in your class

value: When saving the record, this method will be called to get the value
       to store in Redis.

method: defines a method which can be called to get the value of the
        stored Redis key

Usage

class SomeModel < ApplicationRecord

include KeyCache::Cache

cache_key key: "some_model/:id",
          value: :some_attribute,
          method: :some_model_cache

end

s = SomeModel.save!(some_value: “this value”)

s.some_attribute > this value

s.some_attribute_key > some_model/:id

s.some_attribute_redis_key > some_model:1

s.save_some_attribute # Saves key to Redis

s.destroy_some_attribute # Deletes key from Redis

s.destory # Delete record and redis key

Instance Method Summary

• #cache_key_decode(key) ⇒ Object

Instance Method Details

#cache_key_decode(key) ⇒ Object

# File 'lib/key_cache/cache.rb', line 90

def cache_key_decode(key)
  key_parts = key.split('/')
  key_parts.map! do |v|
    v.match(/^:/) ? send(v.tr(':', '')) : v
  end
  key_parts.join(':')
end