Question

为什么ImageMagick无法打开Paperclip上传文件？

我需要能够对它进行一些检查。

class Photo < ActiveRecord::Base
  ATTACHMENT_STYLES = lambda do |attachment|
    if is_something?(attachment.instance)
      ...
    else
      ...
    end
  end
  ATTACHMENT_PROCESSORS = lambda { |attachment| is_something?(attachment.instance) ? [:other_processor] : [:thumbnail] }

  ...

  def self.is_something?(attachment)
    file = Magick::ImageList.new(attachment)

    ...
  end
end

但为什么我会这样做？

Magick::ImageMagickError in TopicsController#create
no decode delegate for this image format `0x00000004e3cc50>' @ error/constitute.c/ReadImage/544
Extracted source (around line #20):
file = Magick::ImageList.new(attachment)

app/models/photo.rb:20:in `new'
app/models/photo.rb:20:in `is_something?'
app/models/photo.rb:3:in `block in <class:Photo>'

Answer 1

看起来你在if块中分配了一个值：

true if file.attachment_content_type = /gif/ && file.size

如果您尝试将其与正则表达式匹配，您实际上想要使用=~，如下所示：

true if file.attachment_content_type =~ /gif/ && file.size

Paperclip和RMagick：此图像格式没有解码代理

1 个答案: