我试着用回形针上传.pdf和.doc。
Command :: file -b --mime '/var/folders/86/5tdcyh5171j6twqqkt49tq040000gn/T/d031fe0d3003c25aa6a9d1525403031a20140707-7537-6y9s83.pdf'
Command :: identify -format '%wx%h,%[exif:orientation]' '/var/folders/86/5tdcyh5171j6twqqkt49tq040000gn/T/d031fe0d3003c25aa6a9d1525403031a20140707-7537-1ru9fns.pdf[0]' 2>/dev/null
[paperclip] An error was received while processing: #<Paperclip::Errors::NotIdentifiedByImageMagickError: Paperclip::Errors::NotIdentifiedByImageMagickError>
Command :: identify -format '%wx%h,%[exif:orientation]' '/var/folders/86/5tdcyh5171j6twqqkt49tq040000gn/T/d031fe0d3003c25aa6a9d1525403031a20140707-7537-1ru9fns.pdf[0]' 2>/dev/null
[paperclip] An error was received while processing: #<Paperclip::Errors::NotIdentifiedByImageMagickError: Paperclip::Errors::NotIdentifiedByImageMagickError>
(0.2ms) begin transaction
Command :: file -b --mime '/var/folders/86/5tdcyh5171j6twqqkt49tq040000gn/T/d031fe0d3003c25aa6a9d1525403031a20140707-7537-1b7261f.pdf'
(0.2ms) rollback transaction发布于 2014-07-07 01:33:00
调整图像大小,即:styles => { :medium => "300x300>", :thumb => "345x215#" }需要影象。安装imagemagick应该可以解决这个问题。
has_attached_file :media,
:styles => {
:medium => "300x300>",
:thumb => "345x215#",
:pdf_thumbnail => ["", :jpg]
},
:default_url => ActionController::Base.helpers.asset_path('branch-default.jpg')
validates :media, :attachment_content_type => { :content_type => ['image/png', 'image/jpg', 'application/pdf', 'application/msword', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document']}此外,指定用于pdf上载的pdf_thumbnail将生成缩略图,尽管我认为此功能需要GhostScript:以下是剪贴画github页面的摘录:
如果您正在处理pdf上载或运行测试套件,您还需要安装GhostScript。
其他内容类型缩略图的另一个有用链接:
https://stackoverflow.com/questions/24601596
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