Question

I’m trying to set up a very basic system for uploading files to my rails 3.1 app. Before people start throwing paperclip and carrierwave links at me, let me say that this is NOT the solution that I am looking for. I have read quiet a few posts on this topic, however, all the code I saw was either depreciated in rails 3.1 or I just did not understand how people came to a solution to this problem.

Updated view/form: (haml)

%h1 File Upload
= form_for :upload,:url=>{:action => 'uploadFile'},:html => { :multipart => true } do |f|
  %p
    %label{:for => "upload_file"} Select File
    \:
    \#{f.file_field 'datafile'}
  = f.submit "Upload"

Updated controller:

class UploadController < ApplicationController
  def index
     render :file => 'upload/uploadfile.haml'
  end

  def uploadFile
    file_param = params[:upload][:datafile]
    post = DataFile.save(file_param)
    render :text => "File has been uploaded successfully"
  end
end

Updated model

class DataFile < ActiveRecord::Base
  def self.save(upload)
    # Changed Default Destination: [__RAILS_DIR__/public/data]
    name = "public/data/" + upload.original_filename

    # can haz data directory?
    require 'FileUtils'
    FileUtils.mkdir_p(File.dirname(name))


    File.open(name, "wb") { |f| f.write(upload.read) }
  end
end

The Solution:

Above is the correct code I used to add simple uploading functionality to my rails 3.1 app

Answer 1

You are passing unnecessary argument “file” to the uploadFile method. It’s an action and passing argument to it is not possible. Just remove the “file” argument.