选择框默认显示文字类似于“请选择发布作业的课程”，点击即弹出供选择的课程列表，课程名称后还需要显示开课学期

app/helpers/users_helper.rb

@@ -541,7 +541,7 @@ module UsersHelper
     end
   end
 
-  #获取指定用户作为老师的课程
+=begin
   def get_as_teacher_courses user
     type = []
     user.courses.select{|c| user.allowed_to?(:as_teacher,c)}.each do |course|
@@ -552,5 +552,18 @@ module UsersHelper
     end
     type
   end
+=end
+
+  #获取指定用户作为老师的课程
+  def get_as_teacher_courses_terms user
+    type = []
+    user.courses.select{|c| user.allowed_to?(:as_teacher,c)}.each do |course|
+      option = []
+      option << course.name+"（"+course.time.to_s+course.term+"）"
+      option << course.id
+      type << option
+    end
+    type
+  end
 
 end

app/views/users/_user_homework_form.html.erb

@@ -27,7 +27,7 @@
 
     <div class="mt10">
       <!--<input type="text" class="InputBox  W700 SearchIcon" placeholder="发送到课程" />-->
-      <%= select_tag :course_id, options_for_select(get_as_teacher_courses(User.current), homework.course_id), {:class => "InputBox  w708",:value => "请选择发布作业的课程"} %>
+      <%= select_tag :course_id, options_for_select(get_as_teacher_courses_terms(User.current), homework.course_id), {:class => "InputBox  w708"} %>
     </div>
     <div class="cl"></div>
 
@@ -43,3 +43,8 @@
   </div>
   <div class="cl"></div>
 </div>
+<script type="text/javascript">
+    $(function (){
+        $("#course_id").append("<option value='-1'hidden selected>请选择发布作业的课程</option>");
+    });
+</script>