优化

app/controllers/challenges_controller.rb

@@ -157,12 +157,12 @@ class ChallengesController < ApplicationController
     uid_logger("identifier: #{params}")
     base_columns = "challenges.id, challenges.subject, challenges.st, challenges.score, challenges.position,
                     challenges.shixun_id, games.identifier, games.status"
+    join_sql = "LEFT JOIN games ON games.challenge_id = challenges.id AND games.user_id = #{current_user.id}"
     # 下面2个参数是为了解决列表获取通关人数与正在游玩人数的问题
     @pass_games_map = @shixun.challenges.joins(:games).where(games: {status:2}).group(:challenge_id).reorder(nil).count
     @play_games_map = @shixun.challenges.joins(:games).where(games: {status:[0,1]}).group(:challenge_id).reorder(nil).count
 
-    @challenges = @shixun.challenges.joins("left join games on games.challenge_id = challenges.id and games.user_id = #{current_user.id}")
+    @challenges = @shixun.challenges.joins(join_sql).select(base_columns)
-                      .select(base_columns)
 
     @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

app/models/challenge.rb

@@ -69,7 +69,7 @@ class Challenge < ApplicationRecord
   end
 
   # 开启挑战
-  def open_game
+  def open_game shixun
     # 这里的identifier,status是关联了games取了games的identifier,status
     identifier = self.identifier
     if identifier.present?
@@ -93,7 +93,7 @@ class Challenge < ApplicationRecord
   # 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
+  def user_tpi_status shixun
     # todo: 以前没加索引导致相同关卡,同一用户有多个games
     # 允许跳关则直接开启
     identifier = self.identifier

app/views/challenges/index.json.jbuilder

@@ -21,7 +21,7 @@ if @challenges.present?
     json.playing_count @play_games_map.fetch(challenge.id, 0)
     #json.playing_count challenge.playing_count
     json.name_url shixun_challenge_path(challenge, shixun_identifier: @shixun.identifier)
-    json.open_game challenge.open_game
+    json.open_game challenge.open_game(@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)
@@ -29,6 +29,6 @@ if @challenges.present?
       json.down_url index_down_shixun_challenge_path(challenge, :shixun_identifier =>  @shixun.identifier) if @shixun.challenges_count != challenge.position
     end
     #json.passed challenge.has_passed?(@user.id)
-    json.status challenge.user_tpi_status
+    json.status challenge.user_tpi_status(@shixun)
   end
 end