如何上传在轨道上的红宝石文件？ [英] How to upload a file in ruby on rails?

问题描述

我在轨道上的红宝石很新。我遇到了一个问题。我想做一个文件上传功能，通过它我可以上传任何类型的文件（文本，图像等）。
我的控制器文件是（upload_controller.rb）：

  class UploadController< ApplicationController 
 def index 
 render：file => 'app \views\upload\uploadfile.html.erb'
 end 
 def uploadFile 
 post = DataFile.save（params [：upload]）
 render：text => 文件已成功上传
结束
结束
  

我的模型文件是（data_file.rb）：

  class DataFile< ActiveRecord :: Base 
 attr_accessor：upload 
 def self.save（upload）
 name = upload ['datafile']。original_filename 
 directory ='public / data'
＃创建文件路径
 path = File.join（directory，name）
＃写入文件
 File.open（path，wp）{| f |阅读）} 
 end 
 end 
  

 < h1>文件上传< / h1>我的查看文件是（uploadfile.html.erb） 
 <％= form_tag（{：action =>'uploadFile'}，：multipart => true）do％> 
< p>< label for =upload_file>选择文件< / label> 
<％= file_field'upload'，'datafile'％>< / p> 
<％= submit_tag上传％> 
<％end％> 
  

现在当我尝试上传图片时，在模型中出现错误invalid access mode wp文件。当我在模型文件中将File.open（路径，wp）更改为File.open（path，w）时，发出错误'\x89'从ASCII-8BIT到UTF-8。对于.txt文件，它工作正常。
我正在使用ruby 1.9.3和rails 3.2.6

解决方案

谢谢你的例子，我学习rails

它在rails 3.1中工作

我的代码：

 路线
资源：图片
集合{post：upload_image} 
结束
  

控制器

  class ImagesController< ApplicationController 
 def index 
 @car = Car.find（params [：car_id]）
 @images = @ car.images.order（order_id）
 end 
 
 def upload_image 
 DataFile.save_file（params [：upload]）
 redirect_to images_path（：car_id => params [：car_id]）
 end 
  

查看index.html.erb

 < h1>档案上载< / h1> 
<％= form_tag（{：action =>'upload_image'，：car_id => @ car.id}，：multipart => true）do％> 
< p>< label for =upload_file>选择文件< / label> 
<％= file_field'upload'，'datafile'％>< / p> 
<％= submit_tag上传％> 
<％end％> 
 
 <％@ images.each do | image | ％GT; 
<％= image.id％>< br /> 
<％= image.name％> 
<％end％> 
  

模型



  class DataFile< ActiveRecord :: Base 
 attr_accessor：upload 
 $ b $ def self.save_file（upload）
 $ b file_name = upload ['datafile']。original_filename if（upload ['datafile ']！=''）
 file = upload ['datafile']。read 
 $ b file_type = file_name.split（'。'）。last 
 new_name_file = Time.now .to_i 
 name_folder = new_name_file 
 new_file_name_with_type =＃{new_name_file}。 + file_type 
 $ b image_root =＃{RAILS_CAR_IMAGES}
 
 
 Dir.mkdir（image_root +＃{name_folder}）; 
 File.open（image_root +＃{name_folder} /+ new_file_name_with_type，wb）do | f | 
 f.write（file）
 end 
 
 end 
 end 
  




I’m very new in ruby on rails. I’m stuck with a problem. I want to make a file upload functionality through which I can upload any kind of file (text,image etc.). My controller file is (upload_controller.rb):

class UploadController < ApplicationController
def index
    render :file => 'app\views\upload\uploadfile.html.erb'
end
def uploadFile
    post = DataFile.save(params[:upload])
    render :text => "File has been uploaded successfully"
end
end

My Model file is (data_file.rb):

class DataFile < ActiveRecord::Base
    attr_accessor :upload
  def self.save(upload)
    name = upload['datafile'].original_filename
    directory = 'public/data'
    # create the file path
    path = File.join(directory,name)
    # write the file
    File.open(path, "wp") { |f| f.write(upload['datafile'].read)}
  end
end

My View file is (uploadfile.html.erb):

<h1>File Upload</h1>
<%= form_tag({:action => 'uploadFile'}, :multipart => true) do %>
<p><label for="upload_file">Select File</label>
<%= file_field 'upload', 'datafile' %></p>
<%= submit_tag "Upload" %>
<% end %>

Now when I try to upload image then I'm getting error "invalid access mode wp" in model file. When I change File.open(path, "wp") to File.open(path, "w") in model file this give error "'\x89' from ASCII-8BIT to UTF-8". For .txt file, It works fine. I'm using ruby 1.9.3 and rails 3.2.6

解决方案

Thank you for example, I study rails too!

It works in rails 3.1

My code:

Routes
resources :images do
      collection { post :upload_image }
    end

Controller

class ImagesController < ApplicationController
  def index
    @car = Car.find(params[:car_id])
    @images = @car.images.order("order_id")
  end

  def upload_image   
    DataFile.save_file(params[:upload])
    redirect_to images_path(:car_id => params[:car_id])
  end

View index.html.erb

<h1>File Upload</h1>
  <%= form_tag({:action => 'upload_image', :car_id => @car.id}, :multipart => true) do %>
    <p><label for="upload_file">Select File</label>
    <%= file_field 'upload', 'datafile' %></p>
    <%= submit_tag "Upload" %>
  <% end %>

  <% @images.each do |image| %>
     <%= image.id %><br/>
     <%= image.name %>
  <% end %>

Model

class DataFile < ActiveRecord::Base
    attr_accessor :upload

  def self.save_file(upload)   

    file_name = upload['datafile'].original_filename  if  (upload['datafile'] !='')    
    file = upload['datafile'].read    

    file_type = file_name.split('.').last
    new_name_file = Time.now.to_i
    name_folder = new_name_file
    new_file_name_with_type = "#{new_name_file}." + file_type

    image_root = "#{RAILS_CAR_IMAGES}"


    Dir.mkdir(image_root + "#{name_folder}");
      File.open(image_root + "#{name_folder}/" + new_file_name_with_type, "wb")  do |f|  
        f.write(file) 
      end

  end
end

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