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我正在尝试在我的 Rails 3.2 应用程序中将 Paperclip gem 与 A​​mazon S3 一起使用。但是,当我添加 :storage => :s3 和 S3 信息并生成表单时,就会出现问题。

错误:

undefined method `photo' for #<PlacePhoto:0x007fdbbd1e75a8>

提取的源代码(第 78 行附近):

75:   <% end %>
76: 
77:   <%= f.simple_fields_for :place_photos do |photo| %>
78:     <%= photo.input :photo %>
79:     <%= photo.input :description,
80:       :label => "Photo label",
81:       :input_html => { :class => 'span4', :rows => 2 } %>

模型:

class PlacePhoto < ActiveRecord::Base
  has_attached_file :photo, 
    :styles => { :medium => "300x300#", :thumb => "100x100#" },
    :storage => :s3,
    :s3_credentials => "#{RAILS_ROOT}/config/s3.yml",
    :path => "/:style/:id/:filename"
  attr_accessible :description, :photo

  belongs_to :place

  validates_attachment :photo,
    :presence => true,
    :content_type => { :content_type => /image/ },
    :size => { :in => 0..2.megabytes }
end

移民

class CreatePlacePhotos < ActiveRecord::Migration
  def change
    create_table :place_photos do |t|
      t.text :description
      t.integer :place_id
      t.has_attached_file :photo

      t.timestamps
    end
  end
end

我使用以下文章来实现 S3:http ://doganberktas.com/2010/09/14/amazon-s3-and-paperclip-rails-3/ 。我做了捆绑安装,rake db:migrate 并重新启动了服务器。

有趣的是,当模型缺少 S3 信息时,不会出现错误并且正在生成表单:

型号(其他版本):

class PlacePhoto < ActiveRecord::Base
  has_attached_file :photo, 
    :styles => { :medium => "300x300#", :thumb => "100x100#" }
  attr_accessible :description, :photo

  belongs_to :place

  validates_attachment :photo,
    :presence => true,
    :content_type => { :content_type => /image/ },
    :size => { :in => 0..2.megabytes }
end
4

1 回答 1

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通过更改解决的问题:

:s3_credentials => "#{RAILS_ROOT}/config/s3.yml",

:s3_credentials => "#{Rails.root}/config/s3.yml",
于 2012-06-13T22:07:30.987 回答