Active Record运行所有查询两次

不知道为什么在生产中发生这种情况：

更新这是来自rails控制台：

User.all User Load (0.5ms) SELECT "users".* FROM "users" User Load (0.5ms) SELECT "users".* FROM "users" 2.0.0-p451 :005 > User.first.destroy User Load (0.6ms) SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 User Load (0.6ms) SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 (0.2ms) BEGIN (0.2ms) BEGIN Discussion Load (60.4ms) SELECT DISTINCT "discussions".* FROM "discussions" INNER JOIN "followers" ON "discussions"."id" = "followers"."discussion_id" WHERE "followers"."user_id" = $1 [["user_id", 1]] Discussion Load (60.4ms) SELECT DISTINCT "discussions".* FROM "discussions" INNER JOIN "followers" ON "discussions"."id" = "followers"."discussion_id" WHERE "followers"."user_id" = $1 [["user_id", 1]] Reply Load (0.8ms) SELECT "replies".* FROM "replies" WHERE "replies"."user_id" = $1 [["user_id", 1]] Reply Load (0.8ms) SELECT "replies".* FROM "replies" WHERE "replies"."user_id" = $1 [["user_id", 1]] SQL (0.4ms) DELETE FROM "users" WHERE "users"."id" = $1 [["id", 1]] SQL (0.4ms) DELETE FROM "users" WHERE "users"."id" = $1 [["id", 1]] (0.5ms) COMMIT (0.5ms) COMMIT 

我的制作设置：

  config.cache_classes = false config.eager_load = false config.consider_all_requests_local = true config.action_controller.perform_caching = false config.action_mailer.default_url_options = { host: 'xxx' } config.action_mailer.raise_delivery_errors = true config.action_mailer.delivery_method = :smtp config.action_mailer.smtp_settings = { :authentication => :plain, :address => "xxx", :port => xxx, :domain => "xxx", :user_name => "xxx", :password => "xxx" } config.active_support.deprecation = :log config.active_record.migration_error = :page_load config.serve_static_assets = :false config.log_level = :debug config.assets.debug = true 

希望有一些共同的问题？ 真不奇怪不是吗？

Answer 1

我遇到了类似的问题，原来这是我为heroku安装的rails_12factor gem中的一个错误。 只需将其设置为Gemfile的生产gemGemfile

 gem 'rails_12factor', group: :production