修复加入课程报错的BUG

app/controllers/courses_controller.rb

@@ -26,7 +26,7 @@ class CoursesController < ApplicationController
   def join
     if User.current.logged?
       course = Course.find_by_id params[:object_id]
-      if course
+      unless course
         @state = 4
       else
         unless (allow_join(course) && User.current.member_of_course?(course))

app/views/users/show.html.erb

@@ -1,11 +1,19 @@
 <% if User.current.id == @user.id %>
     <div class="menu-div">
       <div class="menu">
-        <span style="color: #000; font-weight: bold;"><%= "#{@user.name}的动态" %></span>
+        <span style="color: #000; font-weight: bold;">
+          <%= "#{@user.name}的动态" %>
+        </span>
         <ul><%#链接绑定在页面最下方的jQuery%>
-          <li mode='all' class="<%= "on" if @state.eql?(0) %>"><%= l :label_user_all_activity %></li>
-          <li mode='myself' class="<%= "on" if @state.eql?(1) %>"><%= l :label_user_activity_myself %></li>
-          <li mode='respond' class="<%= "on" if @state.eql?(2) %>"><%= l :label_user_all_respond %></li>
+          <li mode='all' class="<%= "on" if @state.eql?(0) %>">
+            <%= l :label_user_all_activity %>
+          </li>
+          <li mode='myself' class="<%= "on" if @state.eql?(1) %>">
+            <%= l :label_user_activity_myself %>
+          </li>
+          <li mode='respond' class="<%= "on" if @state.eql?(2) %>">
+            <%= l :label_user_all_respond %>
+          </li>
         </ul>
       </div>
       <script type="text/javascript">
@@ -28,6 +36,7 @@
     <% end %>
 <% end %>
 
+<%= render_flash_messages %>
 <% unless @state == 2 %>
     <% unless @activity.empty? %>
         <div id="activity">