在不使用外部gem的情况下将文件上传到db Rails 3

我有一个任务，我需要在Rails 3.2中上传一个文件（.txt），而不使用任何外部gem来完成腿部工作（我担心不可协商）该文件也需要保存到数据库中。 我有以下代码，但是当我尝试使用表单上传/创建新附件时，它会返回错误;

No route matches [POST] "/attachments/create" 

看起来不像使用模型中的uploaded_file调用create动作，但我不确定如何纠正它。 如果有人能指出我正确的方向，我将不胜感激。

所以我的代码如下;

AttachmentsController.rb

 class AttachmentsController  @attachment.filename, :type => @attachment.content_type end def create return if params[:attachment].blank? @attachment = Attachment.new @attachment.uploaded_file = params[:attachment] if @attachment.save flash[:notice] = "Thank you for your submission..." redirect_to root_path else flash[:error] = "There was a problem submitting your attachment." render "new" end end end 

Attachment.rb

 class Attachment < ActiveRecord::Base def uploaded_file=(incoming_file) self.filename = incoming_file.original_filename self.content_type = incoming_file.content_type self.data = incoming_file.read end def filename=(new_filename) write_attributes("filename", sanitize_filename(new_filename)) end private def santize_filename(filename) just_filename = File.basename(filename) just_filename.gsub(/[^\w\.\-]/, '_') end end 

视图/附件/ new.html.erb

的routes.rb

  resources :attachments 

耙路线

  attachments GET /attachments(.:format) attachments#index POST /attachments(.:format) attachments#create new_attachment GET /attachments/new(.:format) attachments#new edit_attachment GET /attachments/:id/edit(.:format) attachments#edit attachment GET /attachments/:id(.:format) attachments#show PUT /attachments/:id(.:format) attachments#update DELETE /attachments/:id(.:format) attachments#destroy root / static_pages#home 

堆栈信息

在2012-07-30 22:21:57 +0100开始发布“/ attachments / create”for 127.0.0.1

 ActionController::RoutingError (No route matches [POST] "/attachments/create"): actionpack (3.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call' actionpack (3.2.3) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' railties (3.2.3) lib/rails/rack/logger.rb:26:in `call_app' railties (3.2.3) lib/rails/rack/logger.rb:16:in `call' actionpack (3.2.3) lib/action_dispatch/middleware/request_id.rb:22:in `call' rack (1.4.1) lib/rack/methodoverride.rb:21:in `call' rack (1.4.1) lib/rack/runtime.rb:17:in `call' activesupport (3.2.3) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.4.1) lib/rack/lock.rb:15:in `call' actionpack (3.2.3) lib/action_dispatch/middleware/static.rb:62:in `call' railties (3.2.3) lib/rails/engine.rb:479:in `call' railties (3.2.3) lib/rails/application.rb:220:in `call' rack (1.4.1) lib/rack/content_length.rb:14:in `call' railties (3.2.3) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.4.1) lib/rack/handler/webrick.rb:59:in `service' /Users/garyrogers/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' /Users/garyrogers/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' /Users/garyrogers/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread' 

不知道从哪里开始。

Answer 1

而不是像这样写：

 <%= form_tag('create', multipart: true) do %> 

尝试：

 <%= form_tag({:controller => 'attachment', :action => 'create'}, :multipart => true) do %> 

你可以在这里找到很多很好的例子： http ： //guides.rubyonrails.org/form_helpers.html

此外，您可能想要更改此行：

 <%= submit_tag "upload", class: 'btn btn-primary' %> 

至：

 <%= submit_tag "upload", :class => 'btn btn-primary' %> 

希望能帮助到你

更新（截至2013年10月22日）：我刚刚开始学习Rails（遗留ruby 1.8.7）时写了原始答案。 :class => "btn"和class: "btn"是相同的，事实上后者在ruby 1.9及以上版本中受到青睐。

Answer 2

你有rake routes吗？ 像这样的资源的rest路径可能只是'/attachments'的POST看看http://guides.rubyonrails.org/routing.html#crud-verbs-and-actions