修改部分项目关注不能及时更新Bug

app/models/project_status.rb

@@ -12,7 +12,7 @@ class ProjectStatus < ActiveRecord::Base
   # 但是 如果超级用户删除其他用户的话会造成读取错误 这里是遗漏点 
   # 删除用户时 此表创建人员未作相应删除动作
   def update_watchers_count(num)
-     if self.watchers_count >= 0
+     if self.watchers_count||0 >= 0
        self.update_attribute(:watchers_count, self.watchers_count.to_i + num)
      end
   end

app/views/projects/_project.html.erb

@@ -82,7 +82,7 @@
 		<% end %>
 		<%= content_tag('span',  link_to(files_count, file_project_path(@project)), :class => "info") %><%= content_tag('span',  l(:label_x_data,:count => files_count)) %>
 	</p>
-	
+
 </div>
 <% end %>
 
@@ -114,19 +114,19 @@
 		<% if(@project.project_type==1)%>
 		&nbsp;&nbsp;&nbsp;<%= l(:label_course_college) %>：
 		<%if @admin&&@admin.first&&@admin.first.user&&@admin.first.user.user_extensions%>
-		<%= @admin.first.user.user_extensions.occupation %> 
+		<%= @admin.first.user.user_extensions.occupation %>
 		<% end %>
 		<% end %>
 	</div>
 	<div class="licences">
 		<%= content_tag('span', "#{l(:label_create_time)}: ") %><%= content_tag('span', format_time(@project.created_on)) %>
 	</div>
-	
+
 	<!-- added by bai -->
 	<div class="grade">
-		
+
 		<% if @project.project_type !=1 %>
-			<%= l(:label_project_grade)%>: 
+			<%= l(:label_project_grade)%>:
 			<span >
 				<%= link_to(format("%.2f" , red_project_scores(@project) ).to_i,
                    {:controller => 'projects',
@@ -138,7 +138,7 @@
 	<!-- end -->
 
 
-	<!--   added by  liuping  -->	
+	<!--   added by  liuping  -->
 	</span>
 
 </div>