Contents

# frozen_string_literal: true

module SecondLevelCache
  module ActiveRecord
    module FetchByUniqKey
      def fetch_by_uniq_keys(where_values)
        cache_key = cache_uniq_key(where_values)
        obj_id = SecondLevelCache.cache_store.read(cache_key)

        if obj_id
          record = begin
                     find(obj_id)
                   rescue StandardError
                     nil
                   end
        end
        return record if record_attributes_equal_where_values?(record, where_values)
        record = where(where_values).first
        if record
          SecondLevelCache.cache_store.write(cache_key, record.id)
          record
        else
          SecondLevelCache.cache_store.delete(cache_key)
          nil
        end
      end

      def fetch_by_uniq_keys!(where_values)
        fetch_by_uniq_keys(where_values) || raise(::ActiveRecord::RecordNotFound)
      end

      def fetch_by_uniq_key(value, uniq_key_name)
        # puts "[Deprecated] will remove in the future,
        # use fetch_by_uniq_keys method instead."
        fetch_by_uniq_keys(uniq_key_name => value)
      end

      def fetch_by_uniq_key!(value, uniq_key_name)
        # puts "[Deprecated] will remove in the future,
        # use fetch_by_uniq_keys! method instead."
        fetch_by_uniq_key(value, uniq_key_name) || raise(::ActiveRecord::RecordNotFound)
      end

      private
        def cache_uniq_key(where_values)
          keys = where_values.collect do |k, v|
            v = Digest::MD5.hexdigest(v) if v.respond_to?(:size) && v.size >= 32
            [k, v].join("_")
          end

          ext_key = keys.join(",")
          "uniq_key_#{name}_#{ext_key}"
        end

        def record_attributes_equal_where_values?(record, where_values)
          # https://api.rubyonrails.org/classes/ActiveRecord/ModelSchema/ClassMethods.html#method-i-type_for_attribute
          where_values.all? { |k, v| record&.read_attribute(k) == type_for_attribute(k).cast(v) }
        end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
second_level_cache-2.6.1	lib/second_level_cache/active_record/fetch_by_uniq_key.rb