请选择发送的课程选择

app/helpers/users_helper.rb

@@ -544,6 +544,10 @@ module UsersHelper
   #获取指定用户作为老师的课程
   def get_as_teacher_courses user
     type = []
+    option = []
+    option << "请选择发布作业的课程"
+    option << -1
+    type << option
     user.courses.select{|c| user.allowed_to?(:as_teacher,c)}.each do |course|
       option = []
       option << course.name+"（"+course.time.to_s+course.term+"）"

app/views/users/_user_homework_form.html.erb

@@ -74,11 +74,6 @@
 </div>
   </div>
 <div class="cl"></div>
-<script type="text/javascript">
-    $(function (){
-        $("#course_id").append("<option value='-1' id='option_select' hidden selected>请选择发布作业的课程</option>");
-    });
-</script>
 
 <script id="t:test-answer-list" type="text/html">
   <div class="mt10">