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
use "wb" instead of "wp". it works
File.open(path, "wb") { |f| f.write(upload['datafile'].read)}
Another great option would be carrierwave, which is very simple to install and the guide on github can have you up and running in a matter of minutes. Add it to your gemfile then run bundle install
There's also a good railscast on the subject
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
The reason for the issue is encoding problems. It seems that you are reading the file in ASCII-8BIT mode and writing it in UTF-8 which means a conversion needs to take place. And conversion from ASCII-8BIT to UTF-8 isn't straight forward. Alternatively, you can specify binary mode for both reading and writing the files.
upload_file = File.new(<original file>, "rb").read
and
File.open(<final uploaded file>, "wb") {|f| f.write(upload_file) }