Use update instead of update_all in the reserve_with_scope_using_optimized_mysql method.

[M-Yamashita01]

Hello, I read the code in the reserve_with_scope_using_optimized_mysql method and found the following code.

delayed_job_active_record/lib/delayed/backend/active_record.rb

Line 148 in d65b0f9

count = ready_scope.limit(1).update_all(locked_at: now, locked_by: worker.name)

We think that the return value of ready_scope.limit(1) is ActiveRecord::Relation and ActiveRecord::Relation has update method in addition to update_all method in Rails 3 and later.
In addition, the target record of ready_scope.limit(1) to be updated is only one record.

Therefore, we think you can use update instead of update_all.
Could you please tell me why you are using the update_all method?

Thank you.