Question

当高于600Kb而不是.gif：

时，尝试将最大宽度设置为1280

has_attached_file :main_image,
  :styles => {:original => "" },
  :convert_options => {
    :original => lambda { |instance| (instance.main_image_file_name.index(/\.gif/,-4).nil? && instance.main_image.size > 600000) ? "-resize 1280>" : "" }
  },
  :path => ":rails_root/public/system/:class/:attachment/:id_:basename.:extension",
  :url => "/system/:class/:attachment/:id_:basename.:extension"

在我的日志中获取此信息：

Command :: convert '/var/folders/hn/2q5wpxh52nn_3nk9wwskr48w0000gn/T/5827912cb359afd550a72bf4f54b109020141119-76993-1i6nij6.png[0]' -auto-orient -resize 1280> '/var/folders/hn/2q5wpxh52nn_3nk9wwskr48w0000gn/T/5827912cb359afd550a72bf4f54b109020141119-76993-1i6nij620141119-76993-q0m833'
sh: 1280: Bad file descriptor
[paperclip] An error was received while processing: #<Paperclip::Error: There was an error processing the thumbnail for 5827912cb359afd550a72bf4f54b109020141119-76993-1i6nij6>

Answer 1

这里有两个问题：

带有Rails的Paperclip通常会要求您在\\或<字符前添加>，如1280x\\>
此外，Paperclip总是需要那些x，即使只做宽度（1280x\\>而不是1280\\>）。

这是我在600Kb以上而不是.gif时将最大宽度设置为1280的完整解决方案：

has_attached_file :main_image,
  :styles => {:original => "" },
  :convert_options => {
    :original => lambda { |instance| (instance.main_image_file_name.index(/\.gif/,-4).nil? && instance.main_image.size > 600000) ? "-resize 1280x\\>" : "" }
  },
  :path => ":rails_root/public/system/:class/:attachment/:id_:basename.:extension",
  :url => "/system/:class/:attachment/:id_:basename.:extension"

Rails Paperclip并不了解与ImageMagick相同的转换选项

1 个答案: