Question

我正在用纸板宝石上传图像, 我想上传景观图像和肖像图像。请帮助我设置两个图像的维度。

我的代码是:

has_attached_file :media,
  :styles => {:yplarge=>"440x300>"},
  :path => ":rails_root/public/system/:class/:id/:style/:basename.:extension", 
  :url  => "/system/buzz_pictures/:id/:style/:basename.:extension"

   validates_attachment_size :media, :less_than => 2.megabytes, 
     :message => "Please attach a smaller picture."
   validates_attachment_content_type :media, 
     :content_type=>[ image/jpeg ,  image/png ,  image/gif ]

此代码用于地貌图像, 但不用于肖像。

Answer 1

只要添加另一个样式 :

:styles => {
  :yplarge=>"440x300>",
  :portrait=>"300X440>"
}

需要时更改值。请注意, 如果图像小于给定的尺寸, 它将不会调整大小。要改变该行为, 将 < code\\ gt; 替换为 < code\\ / code > 。这将强制将图像调整为指定的尺寸。

参考使用不同样式的纸张剪贴文档:

https://github.com/thisbot/paperclip/wiki/Thumbnail-Generation

Answer 2

下面的解决方案将保存两个样式, 肖像由90 旋转, 如果原版在地貌中, 反之亦然。

has_attached_file :media,
  :styles => {:landscape => Proc.new { |a| { :geometry => "440x300>", :rotation => 90 unless a.landscape? } }, 
              :portrait => Proc.new { |a| { :geometry => "300x440>", :rotation => 90 if a.landscape? } } }
  :path => ":rails_root/public/system/:class/:id/:style/:basename.:extension", 
  :url  => "/system/buzz_pictures/:id/:style/:basename.:extension",
  :processors => [:rotator]

def landscape?
  Paperclip::Geometry.from_file(to_file(:original)).horizontal?
end

module Paperclip
  class Rotator < Thumbnail
    def transformation_command
      if rotate_command
        super + rotate_command
      else
        super
      end
    end

    def rotate_command
      if @options[:rotation]
        " -rotate #{ @options[:rotation] }"
      end
    end
  end
end

友情链接