Ruby on rails 使用曲别针的字体的内容类型验证

我正试图将字体文件作为附件上传到回形针中，我遇到了这个错误

ActiveRecord::RecordInvalid: Validation failed: File content type is invalid, File is invalid

这是我试过的

validates_attachment_content_type :file, content_type:['application/x-font-opentype','application/x-font-truetype','application/octet-stream']

还有我的模特

class OtherFont < ActiveRecord::Base
    has_many :texts
  has_attached_file :file, default_url: "/images/:style/missing.png"
   validates_attachment_content_type :file, content_type:['application/x-font-opentype','application/x-font-truetype','application/octet-stream']
  has_attached_file :file,
                    :storage => :s3,
                    :path => "fonts/:id/:style_:extension",
                    :s3_credentials => Proc.new{|a| a.instance.s3_credentials }
  def s3_credentials
    {:bucket => ENV['bucket'], :access_key_id => ENV['access_key_id'], :secret_access_key => ENV['secret_access_key']}
  end                  
end

class OtherFont：s3，
：path=>“字体/：id/：样式\扩展名”，
：s3_credentials=>Proc.new{| a | a.instance.s3_credentials}
def s3_凭证
{：bucket=>ENV['bucket']，：access_key_id=>ENV['access_key_id']，：secret_access_key=>ENV['secret_access_key']
结束
结束

检测到.otf和.ttf的内容类型为“应用程序/八位字节流”

必须在/initialize/paperclip.rb中创建内容类型映射

Paperclip.options[:content_type_mappings] = {
   otf: 'application/x-font-opentype',
   ttf: 'application/x-font-truetype'
}

---

对于.woff，内容类型为“application/font-woff”。已正确检测到.woff的内容类型，不需要包含在内容类型映射中。

将.otf和.ttf的内容类型检测为“应用程序/八位字节流”

必须在/initialize/paperclip.rb中创建内容类型映射

Paperclip.options[:content_type_mappings] = {
   otf: 'application/x-font-opentype',
   ttf: 'application/x-font-truetype'
}

对于.woff，内容类型为“application/font-woff”。已正确检测到.woff的内容类型，不需要将其包含在内容类型映射中