不符合条件的输入的时候，不显示结果

app/views/layouts/base_courses.html.erb

@@ -86,11 +86,15 @@
                 </span>
               <% end %>
               <span id="course_outline_bar">
-              <%if @course.tea_id == User.current.id && (@course.outline == 0 ||  BlogComment.where(:id=>@course.outline).count == 0) %>
+              <%if User.current && @course.tea_id == User.current.id && (@course.outline == 0 ||  BlogComment.where(:id=>@course.outline).count == 0) %>
                   <a href="javascript:void(0);" title="设置课程大纲" onclick="course_outline('<%= @course.id%>')" class="mr5 syllabusSetting fl"> </a>
-               <% elsif @course.tea_id == User.current.id && @course.outline != 0 && BlogComment.where(:id=>@course.outline).count != 0%>
+               <% elsif User.current && @course.tea_id == User.current.id && @course.outline != 0 && BlogComment.where(:id=>@course.outline).count != 0%>
                   <a href="<%=show_course_outline_course_path(@course) %>" title="课程大纲" class="mr5 syllabusIcon fl"> </a>
-                <% elsif @course.tea_id != User.current.id %>
+                <% elsif User.current && @course.tea_id != User.current.id && !@course.is_public? && User.current.member_of_course?(@course)%>
+                  <a href="<%=show_course_outline_course_path(@course) %>" title="课程大纲" class="mr5 syllabusIcon fl"> </a>
+                <% elsif User.current && @course.tea_id != User.current.id && @course.is_public?%>
+                  <a href="<%=show_course_outline_course_path(@course) %>" title="课程大纲" class="mr5 syllabusIcon fl"> </a>
+                <%else%>
                <%end %>
                </span>
             </div>
@@ -233,6 +237,7 @@
                         }
 
                     }else{
+                          $("#course_outline_list").html('');
                           $("#course_outline_hint").show();
                     }
                 }