Rails 3 如何实现最简单的文件上传

Question

想实现简单文件上传到服务器（不用Gem或Plugin），文件名按时间生成，数据库中保存上传后地址。网上查了很多资料，都不能使。

注：Rails版本3.2.11。

Answer 1

自己搞定，主要参考了http://stackoverflow.com/questions/5776252/rails-3-upload-files-to-public-directory

rails g controller mytest upload

[upload.html.erb]

<%= form_for :mytest, :html =>{:multipart => true} do |f| %>
  <%= f.file_field :myfile %>
  <%= f.submit "Upload" %>
<% end %>

[mytest_controller.rb]

def upload
  require 'fileutils' #ruby老版本可尝试改为 require 'ftools'
  tmp = params[:mytest][:myfile]
  file = File.join("public", tmp.original_filename)
  FileUtils.cp tmp.path, file
end

[routes.rb]

match ':controller/:action'

Ruby 1.9.3p362 & Rails 3.2.11 测试通过！

其他信息：

FileUtils使用：
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/fileutils/rdoc/FileUtils.html
http://www.kuqin.com/rubycndocument/man/addlib/fileutils.html

Answer 2

自己搞定，主要参考了http://stackoverflow.com/questions/5776252/rails-3-upload-files-to-public-directory

rails g controller mytest upload

[upload.html.erb]

<%= form_for :mytest, :html =>{:multipart => true} do |f| %>
  <%= f.file_field :myfile %>
  <%= f.submit "Upload" %>
<% end %>

[mytest_controller.rb]

def upload
  require 'fileutils' #ruby老版本可尝试改为 require 'ftools'
  tmp = params[:mytest][:myfile]
  file = File.join("public", tmp.original_filename)
  FileUtils.cp tmp.path, file
end

[routes.rb]

match ':controller/:action'

Ruby 1.9.3p362 & Rails 3.2.11 测试通过！

其他信息：

FileUtils使用：
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/fileutils/rdoc/FileUtils.html
http://www.kuqin.com/rubycndocument/man/addlib/fileutils.html