竞赛列表。贴吧列表的非空判断

数据迁移报错问题修改

app/models/first_page.rb

@@ -1,3 +1,4 @@
 class FirstPage < ActiveRecord::Base
-  attr_accessible :description, :title, :web_title
+  attr_accessible :description, :title, :web_title,:page_type
 end
+                                                                                                                l

app/views/contests/_contest_list.html.erb

@@ -2,11 +2,19 @@
 <% contests.each do |contest|%>
 <table width="95%" border="0" style="padding-left: 10px; padding-top: 10px;">
 	<tr>
-		<td colspan="2" valign="top" width="50" ><%= link_to(image_tag(url_to_avatar(contest.author), :class => 'avatar'), user_path(contest.author), :class => "avatar") %></td>
+		<td colspan="2" valign="top" width="50" >
+            <% unless contest.author.nil? %>
+                <%= link_to(image_tag(url_to_avatar(contest.author), :class => 'avatar'), user_path(contest.author), :class => "avatar") %>
+          <% end %>
+        </td>
 		<td>
 		<table width="100%" border="0">
 			<tr>
-				<td colspan="2" valign="top"><strong><%= link_to(contest.author, user_path(contest.author), :class => 'bid_user') %>: &nbsp;<%= link_to(contest.name, show_contest_contest_path(contest), :class => 'bid_path', :target => "_blank") %></strong></td>
+				<td colspan="2" valign="top"><strong>
+                  <% unless contest.author.nil? %>
+                      <%= link_to(contest.author, user_path(contest.author), :class => 'bid_user') %>:
+                  <% end %>
+                     &nbsp;<%= link_to(contest.name, show_contest_contest_path(contest), :class => 'bid_path', :target => "_blank") %></strong></td>
 			</tr>
 			<tr>
 				<td width="500">

app/views/forums/_forum_list.html.erb

@@ -3,7 +3,11 @@
 <% if forums.any? %>
 	<% forums.each do |forum| %>
 	<div class="forums-index">
-		<div class="forums-inex-avatar"><%= link_to image_tag(url_to_avatar(forum.creator), :class => "avatar"), user_path(forum.creator) %></div>
+		<div class="forums-inex-avatar">
+          <% unless forum.creator.nil? %>
+              <%= link_to image_tag(url_to_avatar(forum.creator), :class => "avatar"), user_path(forum.creator) %>
+          <% end %>
+          </div>
 		<div class="forums-index-content">
 			<p ><%= link_to h(forum.name), forum_path(forum) %></p>
 			<p ><%= forum.description%></p>