diff --git a/app/controllers/challenges_controller.rb b/app/controllers/challenges_controller.rb
index f2a964c8d..bce0ae3c2 100644
--- a/app/controllers/challenges_controller.rb
+++ b/app/controllers/challenges_controller.rb
@@ -149,7 +149,11 @@ class ChallengesController < ApplicationController
   def index
     uid_logger("identifier: #{params}")
     # 通过调试发现 这里includes(:games)性能会慢10倍
-    @challenges = @shixun.challenges.fields_for_list
+    # @challenges = @shixun.challenges.fields_for_list
+    @challenges = Challenge.fields_for_list.includes(:games).where("challenges.shixun_id" => @shixun.id)
+
+    # @challenges = Challenge.includes(:games).where("games.user_id" => 12).where(shixun_id: @shixun.id)
+
     @editable = current_user.manager_of_shixun?(@shixun) && @shixun.status == 0
     @user = current_user
   end
@@ -247,7 +251,6 @@ class ChallengesController < ApplicationController
     # 关卡位置被修改，需要修改脚本
     script = modify_shixun_script @shixun, @shixun.evaluate_script
     @shixun.update_column(:evaluate_script, script)
-
   end
 
   def index_up
diff --git a/app/models/challenge.rb b/app/models/challenge.rb
index 5495dd7a3..f25ce330a 100644
--- a/app/models/challenge.rb
+++ b/app/models/challenge.rb
@@ -51,9 +51,8 @@ class Challenge < ApplicationRecord
   end
 
   # 开启挑战
-  def open_game(user_id)
-    game = self.games.select([:status, :identifier]).where(user_id: user_id).first
-    shixun = self.shixun
+  def open_game user_id, challenge_id, shixun
+    game = games.select{|game| game.challenge_id = challenge_id && game.user_id == user_id}.first
     if game.present?
       shixun.task_pass || game.status != 3 ? "/tasks/#{game.identifier}" : ""
     else
@@ -61,18 +60,31 @@ class Challenge < ApplicationRecord
     end
   end
 
+  # # 开启挑战
+  # def open_game(user_id, shixun)
+  #
+  #
+  #   game = self.games.select([:status, :identifier]).where(user_id: user_id).first
+  #   game = self.games.select{|game| game.user_id == user_id}
+  #   if game.present?
+  #     shixun.task_pass || game.status != 3 ? "/tasks/#{game.identifier}" : ""
+  #   else
+  #     "/api/shixuns/#{shixun.identifier}/shixun_exec"
+  #   end
+  # end
+
   ## 用户关卡状态 0: 不能开启实训; 1:直接开启; 2表示已完成
   def user_tpi_status user_id
     # todo: 以前没加索引导致相同关卡,同一用户有多个games
-    game = self.games.where(user_id: user_id).last
-    status =
-        if game.blank?
-          self.position == 1 ? 1 : 0
-        elsif game.status == 2
-          2
-        else
-          1
-        end
+    game = games.select{|game| game.user_id == user_id }.last
+
+    if game.blank?
+      self.position == 1 ? 1 : 0
+    elsif game.status == 2
+      2
+    else
+      1
+    end
   end
 
   ## 选择题答案
@@ -85,12 +97,12 @@ class Challenge < ApplicationRecord
 
   # 关卡用户通关数
   def user_passed_count
-    games.where(status: 2).count
+    games.select{|game| game.status == 2}.size
   end
 
   # 关卡用户正在挑战的人数
   def playing_count
-    games.where(status: [0, 1]).count
+    games.select{|game| game.status == 0 || game.status == 1}.size
   end
 
   def last_challenge
diff --git a/app/views/challenges/index.json.jbuilder b/app/views/challenges/index.json.jbuilder
index 0b90b5ca5..dc122b8c4 100644
--- a/app/views/challenges/index.json.jbuilder
+++ b/app/views/challenges/index.json.jbuilder
@@ -17,7 +17,7 @@ if @challenges.present?
     json.passed_count challenge.user_passed_count
     json.playing_count challenge.playing_count
     json.name_url shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)
-    json.open_game challenge.open_game(@user.id)
+    json.open_game challenge.open_game(@user.id, challenge.id, @shixun)
     if @editable
       json.edit_url edit_shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)
       json.delete_url shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)