调整

app/controllers/student_work_controller.rb

@@ -609,13 +609,15 @@ class StudentWorkController < ApplicationController
     @student_work_pages = Paginator.new @student_work_count, @limit, @page
     @offset ||= @student_work_pages.offset
     @stundet_works = paginateHelper @stundet_works, @limit
-    @stundet_works = if @homework.homework_type == 1
-                       @stundet_works.includes(:student_works_scores, [user: :user_extensions])
-                     elsif @homework.homework_type == 3
-                       @stundet_works.includes(:student_works_scores, [project: :project_score], [user: :user_extensions])
-                     elsif @homework.homework_type == 4
-                       @stundet_works.includes(:student_works_scores, [myshixun: :games], [user: :user_extensions])
-                     end
+    if @stundet_works.size != 0
+      @stundet_works = if @homework.homework_type == 1
+                         @stundet_works.includes(:student_works_scores, [user: :user_extensions])
+                       elsif @homework.homework_type == 3
+                         @stundet_works.includes(:student_works_scores, [project: :project_score], [user: :user_extensions])
+                       elsif @homework.homework_type == 4
+                         @stundet_works.includes(:student_works_scores, [myshixun: :games], [user: :user_extensions])
+                       end
+    end
     @members = @course.members.where(user_id: @stundet_works.pluck(:user_id)).select([:user_id, :course_group_id])
     respond_to do |format|
       format.js