如果相册目前没有描述,我正在尝试显示指向新描述的链接,但我一直收到NoMethodError:
<% if @album.description.size = 0 %>
<div class="new-description"><%= link_to 'Add Description', "/albums/#{x.id}/edit" %></div>
<% else %>
<div class="description"><%= @album.description %></div>
<% end %>
答案 0 :(得分:0)
你试过了吗?
<% if @album.description.blank? %>
<div class="new-description"><%= link_to 'Add Description', edit_album_path(@album) %></div>
<% else %>
<div class="description"><%= @album.description %></div>
<% end %>
答案 1 :(得分:0)
如果描述应该是一个字符串,这也应该有用。
<% if not @album.description.nil? %>
<div class="new-description"><%= link_to 'Add Description', "/albums/#{x.id}/edit" %></div>
<% else %>
<div class="description"><%= @album.description %></div>
<% end %>
答案 2 :(得分:0)
尝试使用Object#try
:https://github.com/rails/rails/blob/be589a8b01500a4b52a86248458bf57597e568e8/activesupport/lib/active_support/core_ext/object/try.rb
<% if @album.try(:description) %>
<div class="description"><%= @album.description %></div>
<% else %>
<div class="new-description"><%= link_to 'Add Description', "/albums/#{x.id}/edit" %></div>
<% end %>