调整

app/controllers/competitions/competitions_controller.rb

@@ -21,7 +21,7 @@ class Competitions::CompetitionsController < Competitions::BaseController
     @count = competitions.count
 
     competitions = competitions.order(published_at: :desc, online_time: :desc)
-    @competitions = paginate(competitions.includes(:sponsor_schools, current_stage_section: :competition_stage))
+    @competitions = paginate(competitions.includes(sponsor_schools: :school, current_stage_section: :competition_stage))
 
     ids = @competitions.map(&:id)
     @member_count_map = TeamMember.where(competition_id: ids).group(:competition_id).count

app/models/competition.rb

@@ -43,6 +43,10 @@ class Competition < ApplicationRecord
     end
   end
 
+  def sponsor_schools_name
+    sponsor_schools.map{|sponsor| sponsor.school.name}
+  end
+
   def competition_status
     if !status
       com_status = "nearly_published"

app/views/competitions/competitions/index.json.jbuilder

@@ -17,7 +17,7 @@ json.competitions do
     json.end_time competition.end_time&.strftime("%Y-%m-%d")
     json.enroll_end_time competition.enroll_end_time&.strftime("%Y-%m-%d %H:%M:%S")
 
-    json.sponsor_schools competition.sponsor_schools.pluck(:name)
+    json.sponsor_schools competition.sponsor_schools_name
     # section = competition.current_stage_section
     # if section
     #   json.current_stage do