Question

I’m trying to write a general Amazon S3 uploader (will be used mostly for images) for my rails project. I was able to set up the environment in my console following http://amazon.rubyforge.org/.

I was able to follow the guide in the console. However, I had trouble when I applied it to my rails project. When I try to access my new view, I get the following error:

NameError in UploadsController#new 
uninitialized constant UploadsController::Bucket

Here is my controller:

class UploadsController < ApplicationController
require 'aws/s3'

  def new
    photo_bucket = Bucket.find('photos')
    @photos = photo_bucket.objects
  end

  def create
    file = 'black-flowers.jpg'
    S3Object.store(file, open(file), 'photos')
  end
end

In my controller, my new action will contain the form for the upload and a list of all the photos.

My create action will just save the file. I haven’t figured out how the params from the form will be passed into the controller yet, so ignore the ‘black-flowers.jpg’ line.

My guess is that I did not establish a connection in the controller.

How do I establish a connection or fix this error?

Thanks for looking.

Answer 1

Bucket is not a top level constant in this case. You probably want the AWS::S3::Bucket constant for new, and I’d assume something similar for S3Object.

Note that you may also want to look into the Fog library for this.

The fact that you haven’t figured out how params will be passed in implies that you may also want to work through the Rails tutorials without S3 first.