Contents

require 'active_model_cachers/version'
require 'active_model_cachers/config'
require 'active_model_cachers/cache_service_factory'
require 'active_record'
require 'active_record/relation'

module ActiveModelCachers
  def self.config
    @config ||= Config.new
    yield(@config) if block_given?
    return @config
  end
end

class << ActiveRecord::Base
  def cache_at(column, query = nil)
    reflect = reflect_on_association(column)
    if reflect
      query ||= ->(id){ (reflect.belongs_to? ? reflect.active_record : reflect.klass).find_by(id: id) }
    else
      query ||= ->(id){ where(id: id).limit(1).pluck(column).first }
    end

    service_klass = ActiveModelCachers::CacheServiceFactory.create(reflect, "cacher_key_of_#{self}_at_#{column}", &query)
    after_commit ->{ service_klass.instance(id).clean_cache if previous_changes.key?(column) || destroyed? }

    define_singleton_method(:"#{column}_cachers") do
      service_klass
    end
  end

  if not method_defined?(:find_by) # define #find_by for Rails 3
    def find_by(*args)
      where(*args).order('').first
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
active_model_cachers-1.0.0	lib/active_model_cachers.rb