优化

app/controllers/challenges_controller.rb

@@ -164,7 +164,7 @@ class ChallengesController < ApplicationController
 
     #@challenges = @shixun.challenges.joins(join_sql).select(base_columns)
 
-    @challenges = @shixun.challenges.fields_for_list
+    @challenges = @shixun.challenges.includes(:games).fields_for_list
     @editable = @shixun.status == 0 # before_action：有判断权限，如果没发布，则肯定是管理人员
     @user = current_user
     @shixun.increment!(:visits)

app/models/challenge.rb

@@ -142,12 +142,12 @@ class Challenge < ApplicationRecord
 
   # 关卡用户通关数
   def user_passed_count
-    games.where(status: 2).count
+    games.map{|g| g.status == 2}.count
   end
 
   # 关卡用户正在挑战的人数
   def playing_count
-    games.where(status: [0, 1]).count
+    games.map{|g| g.status == 0 || g.status == 1}.count
   end
 
   def last_challenge