Preload multiple attributes at once - N+1 queries

[Laykou]

Is there a way to preload multiple attributes at once?

Having:

class Transaction < ApplicationRecord
  kredis_datetime :locked_at
end


Transaction.limit(100).each do |transaction|
  puts transaction.locked_at
end

triggers 100 Kredis Proxy .... calls

Can I somehow use e.g. redis.multi method to do this only once?

I tried wrapping it somehow into:

transactions = Transaction.limit(100).to_a

$redis.multi do
  transactions.each { |e| e.locked_at } # do the preload
end

# later I expected to use the `.locked_at` without additional call to Redis

but this resulted only in a warning:

Pipelining commands on a Redis instance is deprecated and will be removed in Redis 5.0.0.

redis.multi do
  redis.get("key")
end

should be replaced by

redis.multi do |pipeline|
  pipeline.get("key")
end

Thank you for your help