How to set class level variables in Rails initializer when using spring?

Question

In my config/initializers/transaction_logger.rb I have the following code

# config/initializers/transaction_logger.rb
Transaction::Logger.logger = Transaction::Logger.new("log/transations.log")

Every time I change the code and run the tests I get:

 Failure/Error: delegate :info, :warn, :debug, :error, to: :logger

 Module::DelegationError:
   #<Class:Transaction::Logger>#error delegated to logger.error, but logger is nil: Transaction::Logger

I have to run spring stop and then re-run the test again (seems initializer's code to be executing after spring stop)

How should I set Transaction::Logger.logger to avoid this problem? Thanks

Personally, I remove Spring from all my projects precisely due to this sort of problem. — jvillian, Apr 20 '18 at 19:11
@jvillian this is not acceptable for me because I spring significantly increases my tests boot time in the development — Hirurg103, Apr 20 '18 at 19:17

score 1 · Accepted Answer · answered Apr 20 '18 at 19:35

As spring documentation says

So to avoid this problem, don't save off references to application constants in your initialization code.

Seems this can be related to setting up class variables too

I've moved setting up Transaction::Logger.logger into Transaction::Logger file

# app/core/transaction/logger.rb
class Transaction::Logger < Logger
...
end

Transaction::Logger.logger = Transaction::Logger.new("log/transactions.log")

How to set class level variables in Rails initializer when using spring?

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