Rails > 6.1 support select_all in query_cache breaks

[iambchan]

In the select_all method:

replica_pools/lib/replica_pools/query_cache.rb

Line 27 in 4c1a510

if !query_cache_enabled || locked?(relation)

We call locked? which is no longer supported in Rails 6.2.

Rails edge
https://github.com/rails/rails/blob/80a23227ea3bbf080c51f91efd8a0512ed038821/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb#L101

Rails 6.1
https://github.com/rails/rails/blob/6-1-stable/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb#L97