我使用acts_as_votable gem来管理投票。对于此GET请求，此处似乎发生了“N + 1查询问题”。我尝试添加includes(:votes)来解决它，但它没有用。
以下是我的查询。我使用了decent_exposure。
expose(:words) { Word.includes(:user, :categories).sorted.paginate(:page => params[:page]).all }
您是否知道如何解决此问题？
Started GET "/words?locale=pl" for 127.0.0.1 at 2016-10-28 08:37:41 +0200
Processing by WordsController#index as HTML
Parameters: {"locale"=>"pl"}
User Load (0.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT 1 [["id", 1]]
Word Load (2.0ms) SELECT "words".* FROM "words" ORDER BY created_at DESC LIMIT 20 OFFSET 0
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."id" IN (1)
WordCategory Load (0.6ms) SELECT "word_categories".* FROM "word_categories" WHERE "word_categories"."word_id" IN (2232, 2231, 2230, 2229, 2228, 2227, 2226, 2225, 2224, 2223, 2222, 2221, 2220, 2219, 2218, 2217, 2216, 2215, 2214, 2213)
Category Load (0.6ms) SELECT "categories".* FROM "categories" WHERE "categories"."id" IN (1)
(0.8ms) SELECT COUNT(*) FROM "words"
(0.8ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2232], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.6ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2232], ["votable_type", "Word"], ["vote_flag", "f"]]
(1.3ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", "t"]]
(0.5ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2231], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.6ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2231], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.5ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2230], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.5ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2230], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2229], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2229], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2228], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2228], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2227], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2227], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2226], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2226], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2225], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2225], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2224], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2224], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2223], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2223], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2222], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2222], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2221], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2221], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2220], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2220], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.2ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2219], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2219], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2218], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2218], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2217], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2217], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2216], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2216], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2215], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2215], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2214], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.2ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2214], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
(0.3ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2213], ["votable_type", "Word"], ["vote_flag", "t"]]
(0.4ms) SELECT COUNT(*) FROM "votes" WHERE "votes"."votable_id" = $1 AND "votes"."votable_type" = $2 AND "votes"."vote_flag" = $3 AND "votes"."vote_scope" IS NULL [["votable_id", 2213], ["votable_type", "Word"], ["vote_flag", "f"]]
CACHE (0.0ms) SELECT COUNT(*) FROM "words" WHERE "words"."user_id" = $1 AND "words"."verified" = $2 [["user_id", 1], ["verified", true]]
Rendered words/_words.html.haml (268.3ms)
Rendered words/index.html.haml within layouts/application (280.5ms)
Rendered shared/_ga.html.erb (0.5ms)
Rendered shared/_header.html.haml (15.3ms)
Rendered shared/_alerts.html.haml (1.6ms)
Rendered shared/_footer.html.haml (1.0ms)
Completed 200 OK in 1059ms (Views: 1028.9ms | ActiveRecord: 29.4ms)