小编Tom*_*itz的帖子

undefined method `url' for #<GalleryPhoto:0x007f80c05a4ba8>

10:   <%= @gallery.date %>
11: </p>
12: 
13: <%= @gallery.gallery_photos.first.url %>
14: 
15: 
16: <%= link_to 'Edit', edit_gallery_path(@gallery) %>

我正在尝试在rails应用程序中创建相册系统,在该应用程序中创建相册并通过回形针将图像上传到相册.我无法使用.url方法在我的显示页面上工作以显示图像.它的设置方式是这样的:

画廊模型(有很多gallery_photos)

GalleryPhotos模型(belongs_to gallery)

画廊展示:

<p id="notice"><%= notice %></p>

<p>
  <b>Gallery name:</b>
  <%= @gallery.gallery_name %>
</p>

<p>
  <b>Date:</b>
  <%= @gallery.date %>
</p>

<%= @gallery.gallery_photos.first.url %>


<%= link_to 'Edit', edit_gallery_path(@gallery) %> |
<%= link_to 'Back', galleries_path %>

画廊模型

class Gallery < ActiveRecord::Base
    attr_accessible :date, :gallery_name, :gallery_photos_attributes
    has_many :gallery_photos, :dependent => :destroy

    accepts_nested_attributes_for :gallery_photos

end

gallery_photo模型

class GalleryPhoto …