NameError：未定義的本地變量或方法`消息'

Question

嘗試郵箱gem和視圖中我可以引用消息顯示中的發件人頭像，它的工作原理非常完美，但在收件箱的對話視圖中，我收到一個undefined local variable or method `message'相同的代碼。我對代碼進行了一些調整，但我似乎無法想出顯示發件人頭像的正確線條。

對話收件箱視圖：

<%= content_tag_for(:li, conversation) do |conversation| %> 
    <%= link_to conversation.subject, conversation%> - <%= conversation.updated_at.strftime("%B %-d, %Y %l:%M%P") %> 
    | From: <% conversation.participants.each do |participant| %> 
    <% if participant != current_user %> 
     <%= link_to participant.username, participant %> 
    <% end %> 
    <% end %> 
    <%= image_tag message.sender.avatar.image_url(:avatar) %> 
| 
    <% if conversation.is_completely_trashed?(current_user)%> 
     <%= link_to 'Untrash', [:untrash, conversation], method: :post%> 
    <%else%> 
     <%= link_to 'Move to trash', [:trash, conversation], method: :post%> 

<% end %> 
<% end %> 

消息顯示：

<%= conversation.subject %> 

From: 
<% conversation.participants.each do |participant| %> 
<% if participant != current_user %> 
    <%= link_to participant.username, participant %> 
<% end %> 
<% end %> 
<%= content_tag_for(:li, conversation.receipts_for(current_user)) do |receipt| %> 
<% message = receipt.message %> 
From: <%= message.sender.username %> 
<%= image_tag message.sender.avatar.image_url(:avatar) %> 

<%= simple_format h message.body %> 

Sent <%= conversation.updated_at.strftime("%a, %m/%e/%Y %I:%M %p") %> 

<% end %> 

<%= render 'messages/form', conversation: conversation %> 

Answer 1

設置就像你在郵件視圖也做了在對話收件箱視圖message變量的值

<% message = receipt.message %> ## In Message View 

message變量未在「對話」視圖中定義，即r因爲錯誤。