调整

app/models/competition.rb

@@ -47,6 +47,10 @@ class Competition < ApplicationRecord
     sponsor_schools.map{|sponsor| sponsor.school.name}
   end
 
+  def region_schools_name
+    region_schools.map{|region| region.school.name}
+  end
+
   def competition_status
     if !status
       com_status = "nearly_published"

app/views/competitions/competitions/common_header.json.jbuilder

@@ -12,7 +12,7 @@ json.published @competition.published?
 json.nearly_published @competition.published_at.present?
 json.competition_status @competition.competition_status
 
-json.sponsor_schools @competition.sponsor_schools_name
+json.region_schools @competition.region_schools_name
 
 json.avatar_url url_to_avatar(@competition)