module Apartment::Model::ClassMethods

def cached_find_by_statement(key, &block)

`Setting.find(10)` key will have the value 'id'
while if we run:
`Setting.find_by(key: 'something', value: 'amazing')` key will have an array of symbols: `[:key, :something]`
E.g. If we run the following query:
NOTE: key can either be an array of symbols or a single value. 
def cached_find_by_statement(key, &block)
  # Modifying the cache key to have a reference to the current tenant,
  # so the cached statement is referring only to the tenant in which we've
  # executed this
  cache_key = if key.is_a? String
                "#{Apartment::Tenant.current}_#{key}"
              else
                # NOTE: In Rails 6.0.4 we start receiving an ActiveRecord::Reflection::BelongsToReflection
                # as the key, which wouldn't work well with an array.
                [Apartment::Tenant.current] + Array.wrap(key)
              end
  cache = @find_by_statement_cache[connection.prepared_statements]
  cache.compute_if_absent(cache_key) { ActiveRecord::StatementCache.create(connection, &block) }
end