Ruby Hash：无法将String转换为Integer TypeError

我已经尝试过许多不同的解决方案,这些解决方案来自SE上已发布的类似问题,但不幸的是,它们都没有奏效

哈希：

{"downloadID"=>115,"PageID"=>nil,"title"=>"hi","dlLink"=>"http://www.a.com","imgSrc"=>"http://www.a.com","caption"=>"aaaa","dlLive"=>nil,"createdAt"=>nil,"user_id"=>7}

码：

#edit download
put '/view1/downloadedit' do
  data = JSON.parse(request.body.read)
  puts data
  edit_id = data["downloadID"]
  puts edit_id
  @download = Download.get(:download_id => edit_id)
  puts data
  if @download.update(data)
    status 201
    puts 'edit saved okay'
  else
    status 201
    puts 'edit failed to SAVE'
  end
end