在rails 3.1中使用paperclip和aws-s3的AWS :: Errors :: MissingCredentialsError

Question

我想在aws上传图片.

class Asset < ActiveRecord::Base
  belongs_to :post
  attr_accessible :image
  has_attached_file :image, :styles => { :medium => "640x480>", 
                                     :thumb => "100x100#"},
  :storage => :s3,
   :s3_credentials => "#{Rails.root}/config/s3.yml",
  :path => ":attachment/:id/:style.:extension",
  :bucket => 'yourbucket'
end

s3.yml

development:
  access_key_id: xxxxxxxx

   secret_code: xxxxx

我收到了一条消息

 AWS::Errors::MissingCredentialsError in PostsController#create

Missing Credentials.

 Unable to find AWS credentials.  You can configure your AWS credentials
 a few different ways:

 * Call AWS.config with :access_key_id and :secret_access_key

 * Export AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY to ENV

* On EC2 you can run instances with an IAM instance profile and credentials 
 will be auto loaded from the instance metadata service on those
  instances.

* Call AWS.config with :credential_provider.  A credential provider should
either include AWS::Core::CredentialProviders::Provider or respond to
the same public methods.

= Ruby on Rails

在Ruby on Rails应用程序中,您还可以通过以下方式指定凭据:

• 通过使用上述任何方法的配置初始化程序脚本(例如RAILS_ROOT/config/initializers/aws-sdk.rb).

• 通过位于RAILS_ROOT/config/aws.yml的yaml配置文件.该文件应该像默认的RAILS_ROOT/config/database.yml文件一样格式化.

我相信我正在做最后一步.

的Gemfile

gem 'rails', '3.1.3'
gem 'mysql'
gem 'koala'
gem 'paperclip'
gem 'aws-s3'
gem 'aws-sdk'

Answer 1

以下对我有用:

1. 在初始化程序中创建一个名为aws.rb的文件

2. 在aws.rb文件中输入以下内容:

   AWS.config(
   access_key_id: 'your_access_key',
   secret_access_key: 'your_secret_access_key')
   

3. 然后我的回形针选项看起来像这样:

   has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "100x100>" },       
   :default_url => "missing_:style.png", :default_url => 'missing_:style.png', :storage =>   
   :s3, :bucket => "<my_bucket>"