Question

我的一个页面不断发出此错误：

ActionView::Template::Error (undefined method `+' for nil:NilClass):
    15:   <div class="look_list">
    16:     <% collection.each do |look| %>
    17:       <div class="look_book" id="<%= look.content_id %>">
    18:         <% thumbnail_image = (look.processing? ? "/assets/processing_placeholder.gif" : (look.image.url(:thumb) + "?#{look.updated_at.to_i}")) %>
    19:         <%= image_tag thumbnail_image || "/assets/processing_placeholder.gif",:class=> "look_image", :size => "118x118" %>
    20:         <script type="text/javascript">
    21:
  app/views/looks/index.html.erb:18:in `block in _app_views_looks_index_html_erb__3409922204803071014_68666020'
  app/views/looks/index.html.erb:16:in `_app_views_looks_index_html_erb__3409922204803071014_68666020'

有些背景，我的网站2天前遇到了502坏网关。我们设法重启了网站。但是，它引起了与mongodb的一些连接问题。我们重启数据库后解决了这个问题。但是，这一页继续遇到上述错误。这从未发生过。任何人都可以帮忙吗？

Answer 1

第18行执行前look.image.url(:thumb)的值是多少？这就是抛出错误的地方，它是我看到+

的唯一地方

我会检查你的数据，看看崩溃是否导致数据丢失，特别是该方法所需的数据

Answer 2

尝试这样的事情......

<div class="look_list">
        <% collection.each do |look| %>
         <div class="look_book" id="<%= look.content_id %>">
            <% thumbnail_image = look.image.url(:thumb) unless look.processing? %>
                  <% thumbnail_image.nil? ? "/assets/processing_placeholder.gif" : (look.image.url(:thumb) + "?#{look.updated_at.to_i}") %>
            <%= image_tag thumbnail_image ,:class=> "look_image", :size => "118x118" %>
        </div>
        <% end %>
</div>

ActionView :: Template :: Error（未定义的方法`+'代表nil：NilClass）：

2 个答案: