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我想在网页上显示一个新颖的对象以及与之相关的每个插图。1.不知道如何正确编写代码来获取小说的相关插图。2. 我不知道如何正确引用插图对象的属性。3. 我认为我的错误可能来自无关的东西。

新型号：

Class Novel < ActiveRecord::Base
   has_many :illustrations
   attr_accessible :id, :name, :author, :edition, :publisher, :publication_city, :publication_date, :illustrations
   validates :id, uniqueness: true, presence: true
   validates :name, :author, :edition, :publisher, :publication_city, :publication_date,     presence: true
end

插图模型：

class Illustration < ActiveRecord::Base
  belongs_to :novel
  attr_accessible :id, :illustrator, :image_url,
  :image_thumbnail_url, :name, :source, :tags,
  :description, :novel_id
  validates :id, uniqueness: true
  validates :name, :source, presence: true
  validates :image_url, 
  format: { with: %r{\.{gif|.jpg|.png}\Z}i, 
  message: 'must be a URL for .gif, .jpg, or .png'}
  validates :image_thumbnail_url, 
  format: { with: %r{\.{gif|.jpg|.png}\Z}i, 
  message: 'must be a URL for .gif, .jpg, or .png'}
  validates :illustrator, :tags, :description, presence: true
 end

小说索引类：

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

<h1 style="padding-left:25px">Archive Overview</h1>

<% @novels.each do |novel| %>
<%= illustrations = novel.map(&:illustration) %>
<div class="row">
    <div class="span3" style="padding:0px 0px 25px 25px">
        <%= link_to novel.name, novel %>
    </div>
    <div class="span4">
        <p><%= novel.author%></p>
        <p><%= novel.publisher %></p>
        <p><%= novel.publication_date %></p>
    <div class="span5">
        <ul>    
            <% for illustrations.each do |illustration| %>
            <li><%= illustration.name %></li>
            <% end %>
        </ul>
    </div>
    </div>
</div>
<% end %>

我在illustration.each上使用for循环语法的任何组合得到的错误：

SyntaxError in Booklist#index

Showing /home/joe/Documents/workspace/archive/app/views/booklist/index.html.erb where line #21 raised:

/home/joe/Documents/workspace/archive/app/views/booklist/index.html.erb:21: syntax error, unexpected '\n', expecting tCOLON2 or '[' or '.'
Extracted source (around line #21):

18:             <ul>    
19:                 <% for illustrations.each do |illustration| %>
20:                 <li><%= illustration.name %></li>
21:                 <% end %>
22:             </ul>
23:         </div>
24:         </div>
Trace of template inclusion: app/views/booklist/index.html.erb

Rails.root: /home/joe/Documents/workspace/archive
4

1 回答 1

2

您for很少将其语法与 each 方法混合。你应该这样做

<% illustrations.each do |illustration| %>
  <li><%= illustration.name %></li>
<% end %>
于 2013-02-28T01:01:58.547 回答