outline bug

app/views/layouts/base_courses.html.erb

@@ -90,9 +90,9 @@
                   <a href="javascript:void(0);" title="设置课程大纲" onclick="course_outline('<%= @course.id%>')" class="mr5 syllabusSetting fl"> </a>
                <% 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 User.current && @course.tea_id != User.current.id && !@course.is_public? && User.current.member_of_course?(@course)%>
+                <% elsif User.current && @course.tea_id != User.current.id && !@course.is_public? && User.current.member_of_course?(@course)  && @course.outline != 0%>
                   <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?%>
+                <% elsif User.current && @course.tea_id != User.current.id && @course.is_public? && @course.outline != 0%>
                   <a href="<%=show_course_outline_course_path(@course) %>" title="课程大纲" class="mr5 syllabusIcon fl"> </a>
                 <%else%>
                <%end %>