ruby-on-rails - 如何通过表单获取临时文件的内容

Question

index.html.erb

= form_for :file_upload, :html => {:multipart => true} do |f|
      = f.label :uploaded_file, 'Upload your file.'
      = f.file_field :uploaded_file
      = f.submit "Load new dictionary"

模型

def file_upload
    file = Tempfile.new(params[:uploaded_file])
    begin
        @contents = file
    ensure
        file.close
        file.unlink   # deletes the temp file
    end
end

索引

def index
    @contents
end

但在我上传文件 = @contents

后，我的页面上没有打印任何内容

Answer 1

使用file.read读取上传文件的内容:

def file_upload
  @contents = params[:uploaded_file].read
  # save content somewhere
end