fix

app/controllers/competition_teams_controller.rb

@@ -44,7 +44,7 @@ class CompetitionTeamsController < ApplicationController
     student_count_subquery = CourseMember.where('course_id = courses.id AND role = 5').select('count(*)').to_sql
     subquery = StudentWork.where('homework_common_id = hcs.id')
                 .select('sum(compelete_status !=0 ) as finish, count(*) as total')
-                .having('finish > (total / 2)').to_sql
+                .having('total != 0 and finish >= (total / 2)').to_sql
     course_ids = Course.where('courses.created_at > ?', Time.parse('2018-06-01'))
                    .where('courses.created_at <= ?', @competition.end_time)
                    .where("(#{student_count_subquery}) >= 10")
@@ -367,7 +367,7 @@ class CompetitionTeamsController < ApplicationController
   def get_valid_course_count(ids)
     percentage_sql = StudentWork.where('homework_common_id = homework_commons.id and homework_commons.publish_time is not null and homework_commons.publish_time < NOW()')
                        .select('sum(compelete_status !=0 ) as finish, count(*) as total')
-                       .having('total != 0 && finish > (total / 2)').to_sql
+                       .having('total != 0 and finish >= (total / 2)').to_sql
 
     Course.joins(shixun_homework_commons: :homework_commons_shixuns)
       .where('shixun_id in (?)', ids)
@@ -378,7 +378,7 @@ class CompetitionTeamsController < ApplicationController
   def get_valid_shixun_count(ids)
     percentage_sql = StudentWork.where('homework_common_id = homework_commons.id and homework_commons.publish_time is not null and homework_commons.publish_time < NOW()')
                        .select('sum(compelete_status !=0 ) as finish, count(*) as total')
-                       .having('finish > (total / 2)').to_sql
+                       .having('total != 0 and finish >= (total / 2)').to_sql
     Shixun.joins(homework_commons_shixuns: :homework_common)
       .where(homework_commons: { homework_type: 3 })
       .where('course_id in (?)', ids)