在我的开发环境中，我有一个单一的请求，该请求会生成数百个相同的查询：
Person Load (24.4ms) SELECT "persons".* FROM "persons" WHERE ("persons"."person_id" = 517) LIMIT 1
. . .
Person Load (64.4ms) SELECT "persons".* FROM "persons" WHERE ("persons"."person_id" = 517) LIMIT 1
为什么是这样？我以为Rails应该在每个请求的默认情况下启用查询缓存？
config/development.rb:
config.cache_classes = false
config.perform_caching = true
. . .
# Show full error reports and disable caching
config.consider_all_requests_local = true
config.action_view.debug_rjs = true
config.action_controller.perform_caching = true
config.active_support.deprecation = :log