如何根据 URL 中的参数破坏我的缓存键？答案

【问题标题】：How do I bust my cache key based on the params in the URL?如何根据 URL 中的参数破坏我的缓存键？
【发布时间】：2017-03-20 08:54:51
【问题描述】：

我有一个Profile#Index 视图，我在其中渲染一个像这样的部分：

<% cache @profiles do %>
  <div class="wrapper wrapper-content">
  <% @profiles.to_a.in_groups_of(3, false).each do |profiles| %>
      <div class="row">
         <%= render partial: "profile", collection: profiles, cached: true %>
      </div>
    <% end %>
  </div>
<% end %>

但在我的app/views/profiles/_profile.html.erb 中，我有以下内容：

  <% cache profile do %>
    <% elsif current_user.has_role?(:coach) && params[:rating].present? %>
    <div class="contact-box-footer">
      <div class="row text-center avg-ratings">
        <div class="col-lg-3">
          <span class="label label-success">Speed: <%= profile.ratings.find_by(user: current_user).speed %></span>
        </div>
        <div class="col-lg-3">
          <span class="label label-info tackling">Tackling: <%= profile.ratings.find_by(user: current_user).tackling %></span>
        </div>
      </div>
    </div>
    <% end %>
  <% end %>

上面所做的是在结果底部生成标签，这些标签只有在上面代码中的params检查有效/真实时才会出现在结果上。

因此，当登录用户访问/ 时，他们应该会看到一个配置文件列表，该列表的工作原理如下：

然后他们会触发相同的 root_path，但带有参数，它看起来（正确地）像这样：

但是，问题在于，当我返回根页面时，它会混合并匹配来自参数版本的页面的结果，以及来自 root_path 的普通香草结果，它应该与来自的结果相同上面的第一张图片（也就是普通的结果）。

我该如何解决这个问题？

编辑 1

根据 Austio 的建议，我将 params[:rating] 添加到部分视图和集合视图中。

所以我的app/views/profiles/_profile.html.erb 现在看起来像这样：

<% cache [params[:rating], profile] do %>
    <% elsif current_user.has_role?(:coach) && params[:rating].present? %>
    <div class="contact-box-footer">
      <div class="row text-center avg-ratings">
        <div class="col-lg-3">
          <span class="label label-success">Speed: <%= profile.ratings.find_by(user: current_user).speed %></span>
        </div>
        <div class="col-lg-3">
          <span class="label label-info tackling">Tackling: <%= profile.ratings.find_by(user: current_user).tackling %></span>
        </div>
      </div>
    </div>
    <% end %>
  <% end %>

虽然两者都不能正常工作，但这里是带有上述代码 sn-p 的请求的日志。

这是为了正确的缓存视图。

Started GET "/profiles?rating=speed" for ::1 at 2016-11-07 10:05:34 -0500
Processing by ProfilesController#index as HTML
  Parameters: {"rating"=>"speed"}
  User Load (10.7ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 7], ["LIMIT", 1]]
  Role Load (3.3ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Role Load (4.1ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Role Load (2.6ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'player') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (2.7ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'player') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (2.1ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (4.9ms)  SELECT "ratings"."profile_id" FROM "ratings" WHERE "ratings"."user_id" = $1 ORDER BY "ratings"."speed" DESC  [["user_id", 7]]
  Profile Load (6.2ms)  SELECT "profiles".* FROM "profiles" WHERE "profiles"."id" IN (5, 18, 14, 7, 22, 13, 9, 17)
  Tournament Load (2.6ms)  SELECT  "tournaments".* FROM "tournaments" ORDER BY "tournaments"."id" ASC LIMIT $1  [["LIMIT", 1]]
  Rendering profiles/index.html.erb within layouts/application
Read fragment views/profiles/5-20161105043153971213/profiles/18-20161101223838805685/profiles/14-20161105042425134917/profiles/7-20161101001052922220/profiles/22-20161106175803133611/profiles/13-20161104221749051281/profiles/9-20161104221706306433/profiles/17-20161105043606243802/59a852f082290d51847bb12ee90b9d25 (0.3ms)
  Rendered profiles/index.html.erb within layouts/application (15.0ms)
  CACHE (0.0ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Rendered shared/_navbar.html.erb (15.1ms)
  Rendered layouts/_messages.html.erb (1.8ms)
  Rendered shared/_footer.html.erb (0.6ms)
Completed 200 OK in 914ms (Views: 671.1ms | ActiveRecord: 39.3ms)

这是针对不正确的缓存视图：

Started GET "/" for ::1 at 2016-11-07 10:06:17 -0500
  User Load (8.8ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 7], ["LIMIT", 1]]
Processing by ProfilesController#index as HTML
  Role Load (6.4ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Role Load (2.8ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Role Load (3.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'player') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (6.2ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'player') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (5.1ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Profile Search (148.2ms)  curl http://localhost:9200/profiles_development/_search?pretty -d '{"query":{"match_all":{}},"size":1000,"from":0,"timeout":"11s","_source":false}'
  Tournament Load (2.3ms)  SELECT  "tournaments".* FROM "tournaments" ORDER BY "tournaments"."id" ASC LIMIT $1  [["LIMIT", 1]]
  Rendering profiles/index.html.erb within layouts/application
  Profile Load (4.9ms)  SELECT "profiles".* FROM "profiles" WHERE "profiles"."id" IN (14, 22, 12, 21, 9, 5, 4, 15, 6, 7, 16, 18, 13, 23, 17)
Read fragment views/profiles/14-20161105042425134917/profiles/22-20161106175803133611/profiles/12-20161101225114614189/profiles/21-20161103035514173735/profiles/9-20161104221706306433/profiles/5-20161105043153971213/profiles/4-20161103035528589634/profiles/15-20161029013919242687/profiles/6-20161105043216951643/profiles/7-20161101001052922220/profiles/16-20161029020526832889/profiles/18-20161101223838805685/profiles/13-20161104221749051281/profiles/23-20161104062851335443/profiles/17-20161105043606243802/59a852f082290d51847bb12ee90b9d25 (6.3ms)
Read fragment views//profiles/12-20161101225114614189/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
   (5.6ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 12], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (3.2ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 12], ["LIMIT", 1]]
  School Load (4.4ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
  CACHE (0.1ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/12-20161101225114614189/01a5673b1dc193ec7173e62efba21a9b (0.2ms)
  Rendered collection of profiles/_profile.html.erb [2 / 3 cache hits] (68.4ms)
Read fragment views//profiles/21-20161103035514173735/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
   (2.8ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 21], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (2.6ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 21], ["LIMIT", 1]]
  School Load (3.8ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/21-20161103035514173735/01a5673b1dc193ec7173e62efba21a9b (2.2ms)
  Rendered collection of profiles/_profile.html.erb [2 / 3 cache hits] (46.5ms)
Read fragment views//profiles/4-20161103035528589634/01a5673b1dc193ec7173e62efba21a9b (0.0ms)
   (2.6ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 4], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (2.6ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 4], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/4-20161103035528589634/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
Read fragment views//profiles/15-20161029013919242687/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
   (2.3ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 15], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (5.3ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 15], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (3.7ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/15-20161029013919242687/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
Read fragment views//profiles/6-20161105043216951643/01a5673b1dc193ec7173e62efba21a9b (0.3ms)
   (2.9ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 6], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (3.0ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 6], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/6-20161105043216951643/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
  Rendered collection of profiles/_profile.html.erb [0 / 3 cache hits] (83.4ms)
Read fragment views//profiles/16-20161029020526832889/01a5673b1dc193ec7173e62efba21a9b (0.0ms)
   (2.3ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 16], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (3.9ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 16], ["LIMIT", 1]]
  CACHE (0.2ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/16-20161029020526832889/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
  Rendered collection of profiles/_profile.html.erb [2 / 3 cache hits] (28.6ms)
Read fragment views//profiles/23-20161104062851335443/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
   (1.8ms)  SELECT COUNT(*) FROM "votes" WHERE "votes"."voter_id" = $1 AND "votes"."voter_type" = $2 AND "votes"."votable_id" = $3 AND "votes"."votable_type" = $4 AND "votes"."vote_scope" IS NULL AND "votes"."vote_flag" = $5  [["voter_id", 7], ["voter_type", "User"], ["votable_id", 23], ["votable_type", "Profile"], ["vote_flag", true]]
  Position Load (2.9ms)  SELECT  "positions".* FROM "positions" INNER JOIN "positions_profiles" ON "positions"."id" = "positions_profiles"."position_id" WHERE "positions_profiles"."profile_id" = $1 ORDER BY "positions"."id" ASC LIMIT $2  [["profile_id", 23], ["LIMIT", 1]]
  School Load (2.2ms)  SELECT  "schools".* FROM "schools" WHERE "schools"."id" = $1 LIMIT $2  [["id", 3], ["LIMIT", 1]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
Write fragment views//profiles/23-20161104062851335443/01a5673b1dc193ec7173e62efba21a9b (0.1ms)
  Rendered collection of profiles/_profile.html.erb [2 / 3 cache hits] (27.6ms)
Write fragment views/profiles/14-20161105042425134917/profiles/22-20161106175803133611/profiles/12-20161101225114614189/profiles/21-20161103035514173735/profiles/9-20161104221706306433/profiles/5-20161105043153971213/profiles/4-20161103035528589634/profiles/15-20161029013919242687/profiles/6-20161105043216951643/profiles/7-20161101001052922220/profiles/16-20161029020526832889/profiles/18-20161101223838805685/profiles/13-20161104221749051281/profiles/23-20161104062851335443/profiles/17-20161105043606243802/59a852f082290d51847bb12ee90b9d25 (0.1ms)
  Rendered profiles/index.html.erb within layouts/application (357.4ms)
  CACHE (0.0ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Rendered shared/_navbar.html.erb (20.6ms)
  Rendered layouts/_messages.html.erb (2.4ms)
  Rendered shared/_footer.html.erb (0.6ms)
Completed 200 OK in 1704ms (Views: 1262.0ms | Searchkick: 148.2ms | ActiveRecord: 89.4ms)

还是不行。希望该日志说明了一些可以帮助我深入了解的内容。

编辑 2

当我将 params[:rating] 添加到我的集合和部分缓存键时，它仍然无法在 root_page 上工作（也就是它显示不正确的部分）。以下是该结果的日志：

Started GET "/" for ::1 at 2016-11-07 11:50:15 -0500
  User Load (23.9ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 7], ["LIMIT", 1]]
Processing by ProfilesController#index as HTML
  Role Load (2.3ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Role Load (4.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Role Load (3.9ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'player') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (4.2ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'player') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
   (1.8ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Profile Search (157.6ms)  curl http://localhost:9200/profiles_development/_search?pretty -d '{"query":{"match_all":{}},"size":1000,"from":0,"timeout":"11s","_source":false}'
  Tournament Load (4.6ms)  SELECT  "tournaments".* FROM "tournaments" ORDER BY "tournaments"."id" ASC LIMIT $1  [["LIMIT", 1]]
  Rendering profiles/index.html.erb within layouts/application
  Profile Load (7.1ms)  SELECT "profiles".* FROM "profiles" WHERE "profiles"."id" IN (14, 22, 12, 21, 9, 5, 4, 15, 6, 7, 16, 18, 13, 23, 17)
Read fragment views//profiles/14-20161105042425134917/profiles/22-20161106175803133611/profiles/12-20161101225114614189/profiles/21-20161103035514173735/profiles/9-20161104221706306433/profiles/5-20161105043153971213/profiles/4-20161103035528589634/profiles/15-20161029013919242687/profiles/6-20161105043216951643/profiles/7-20161101001052922220/profiles/16-20161029020526832889/profiles/18-20161101223838805685/profiles/13-20161104221749051281/profiles/23-20161104062851335443/profiles/17-20161105043606243802/c6925e7eaf791cab78909b69752bd7f8 (0.3ms)
  Rendered profiles/index.html.erb within layouts/application (30.5ms)
  CACHE (0.0ms)  SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)) OR ((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.0ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  CACHE (0.1ms)  SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'coach') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL)))  [["user_id", 7]]
  Rendered shared/_navbar.html.erb (26.9ms)
  Rendered layouts/_messages.html.erb (3.3ms)
  Rendered shared/_footer.html.erb (0.9ms)
Completed 200 OK in 1677ms (Views: 1264.0ms | Searchkick: 157.6ms | ActiveRecord: 28.1ms)

【问题讨论】：

如果您删除@profiles 上的缓存调用并仅使用部分缓存调用会发生什么？
您也可以添加您的最新代码吗？
@rpearce 如果我删除了@profiles 上的缓存调用，那仍然不能解决问题。在我最新的代码中，我删除了所有缓存调用，因为它们都破坏了我的界面。不过，我已经尝试了所有排列。即缓存在一个地方，在所有地方，并交替组合....但没有骰子。有没有你想让我尝试的特定组合（例如，没有@profiles，但在_profile.html.erb 中的profile）？如果是这样，您希望我发布什么结果？日志？告诉我你在寻找什么。

标签： ruby-on-rails caching ruby-on-rails-5 russian-doll-caching

【解决方案1】：

看起来您的 Profile#Index 视图正在为使用内部缓存键的配置文件部分使用集合缓存：

<%= render partial: "profile", collection: profiles, cached: true %>

这导致 Lola Hessel 和 Jeremy Verley（以及其他人）在登录用户转到 / 时被缓存。之后使用参数访问root_path 会导致剩余的配置文件被缓存。然后，第三个页面加载对每个配置文件都有缓存命中，并将它们呈现为之前缓存的内容。由于集合缓存首先服务，因此您的配置文件部分中的缓存无效。

你可以在这里阅读：http://guides.rubyonrails.org/caching_with_rails.html#collection-caching

我认为，从部分渲染中删除集合缓存并结合配置文件部分中适当调整的缓存语句（例如<% cache [profile, params[:rating].present?] do %>）可以解决问题。

【讨论】：

当你说properly adapted cache key within the profile partial时，你是什么意思？你的意思是：<% cache [params[:rating], profile] do %>?
是的，完全正确。缓存键，唯一标识配置文件的不同显示可能性。据我所知，params[:rating] 的存在在这里有所不同。由于各自的params[:rating] 不会对显示的内容产生影响，因此像<% cache [profile, params[:rating].present?] do %> 这样的缓存键可能会更具体且内存效率更高。
兄弟，这是完美的。我现在唯一遇到的问题是我的params[:rating] 可以有不同的值。所以现在我在profile?ratings 视图和profiles#Index 视图之间不再看到相同的值。但是，当我执行profiles?rating=speed 或profiles?rating=tackling 时，我看到了相同的视图。当我检查日志时，我从两个视图中都看到了很多 Read fragments（这表明缓存没有被正确破坏）。如何正确破坏每个 params[:rating] 值的密钥，而不仅仅是存在？
其实我明白了。我所要做的只是cache [profile, params[:rating]]。我认为正在发生的事情是我在做[params[:rating], profile]，我认为这搞砸了一些东西，加上集合缓存。非常感谢。

【解决方案2】：

将评分添加到 cache_key 作为第二个参数

<% 
   caching_key = [@profile]
   caching_key << "with_rating" if params[:rating].present?
   #TODO: Refactor this to cache_key_for_profile(@profile, params) helper
   cache caching_key do 
%>

从设计的角度来看，我建议只使用两个不同的配置文件部分，一个带有评级，一个没有，这样您的代码看起来像

<div class="row">
  <% if params[:ratings].present? %>
    <%= render partial: "profile_with_rating", collection: profiles, cached: true %>
  <% else %>
    <%= render partial: "profile", collection: profiles, cached: true %>
  <% end %>
</div>

可以重构两个部分之间共享的代码。这明确地让您知道，根据评级是否存在，呈现的 profile 部分之间会有差异。

【讨论】：