选用实训的顺序

app/controllers/homework_commons_controller.rb

@@ -787,7 +787,8 @@ class HomeworkCommonsController < ApplicationController
 
   def create_shixun_homework
     tip_exception("请至少选择一个实训") if params[:shixun_ids].blank?
-    shixuns = Shixun.where(id: params[:shixun_ids]).order("field(id, #{params[:shixun_ids].reverse})")
+    order_ids = params[:shixun_ids].size > 0 ? params[:shixun_ids].reverse.join(',') : -1
+    shixuns = Shixun.where(id: params[:shixun_ids]).order("field(id, #{order_ids})")
     @homework_ids = []
     unless params[:category_id].blank?
       @category = @course.course_second_categories.find_by(id: params[:category_id], category_type: "shixun_homework")

app/controllers/subjects_controller.rb

@@ -200,7 +200,8 @@ class SubjectsController < ApplicationController
   end
 
   def append_to_stage
-    @shixuns = Shixun.where(id: params[:shixun_id]).order("field(id, #{params[:shixun_id]})")
+    order_ids = params[:shixun_id].size > 0 ? params[:shixun_id].join(',') : -1
+    @shixuns = Shixun.where(id: params[:shixun_id]).order("field(id, #{order_ids})")
   end
 
   # 添加实训项目