Requested Talk: How do CurrentAttributes work?

[HashNotAdam]

Description:
Rails includes a class called ActiveSupport::CurrentAttributes that can be used to store values that relate only to the current request or job.

For example:

class Current < ActiveSupport::CurrentAttributes
  attribute :user
end

Current.user = User.first

How does Rails store these values?
How can it ensure these values can only be read in the current request?
What happens when you change the isolation level?
From a practical standpoint, what does the isolation level mean?

Estimated Talk Time:
10–15 minutes

[darkfishy]

@HashNotAdam and @simran-sawhney
I could talk about this in November, with proper presentation slides then 😅