调整

app/controllers/courses_controller.rb

@@ -104,7 +104,12 @@ class CoursesController < ApplicationController
   # GET /courses/new
   def new
     @course = Course.new
-    normal_status("成功")
+    unless params[:subject_id].blank?
+      subject = Subject.find_by(id: params[:subject_id], excellent: 1)
+      render :json => {status: 0, course_name: "#{subject&.name}第#{subject&.courses&.count.to_i + 1}期"}
+    else
+      normal_status("成功")
+    end
   end
 
   # Get /courses/:id/settings