在我的用户模型中,我想在上传时调整图像大小。我将图像存储在亚马逊 s3 上。一切都很好,图像显示、上传、删除等,直到我尝试在块中添加after_assign
方法。image_accessor
这是错误:
None of the functions registered with Dragonfly::Processor were able to deal with the
method call thumb
我已经按照在线教程进行操作,并仔细检查了所有内容。我认为这是 imagemagick 或 rmagick 的错误,但在重新安装后我不知所措。我的路径$ which convert
是 /opt/local/bin/convert ,我很确定该路径显示出来是好的。
关于如何让流程正常工作的任何建议?我在 Snow Leopard、Ruby 1.9.3 和 Rails 3.2.5 上运行
以供参考:
这是我的用户模型:
class User < ActiveRecord::Base
image_accessor :avatar do
storage_path{ |file| "#{self.id}/avatar/#{rand(1000)}.#{file.format}" }
after_assign{ |a| a.thumb!('300x300#') }
end
...
attr_accessible :name, :location, :avatar, :retained_avatar,
# Used by Devise
:email, :password, :password_confirmation, :remember_me, :confirmed_at
validates_size_of :avatar, maximum: 5.megabytes, allow_nil: true
validates_property :format, of: :avatar,
in: [ :jpg, :png, :gif ], case_sensitive: false, allow_nil: true,
message: "Only .jpg, .png and .gif file formats are supported."
end
这是我的蜻蜓初始化程序
require 'dragonfly'
app = Dragonfly[:images]
app.configure_with(:imagemagick)
app.configure_with(:rails)
app.datastore = Dragonfly::DataStorage::S3DataStore.new
app.datastore.configure do |c|
c.bucket_name = ENV['S3_BUCKET']
c.access_key_id = ENV['S3_KEY']
c.secret_access_key = ENV['S3_SECRET']
c.url_scheme = 'https'
end
app.define_macro(ActiveRecord::Base, :image_accessor)