未定义的方法'presigned_post'AWS-SDK gem Rails 4

Question

I'm trying to implement direct uploading to S3 via the aws-sdk gem. For some reason when trying to create the uploaded URL with the presigned_post method I get an error undefined method 'presigned_post' for nil:NilClass . Here's my setup so far:

aws.rb

Aws.config.update({
  region: 'us-east-2',
  credentials: Aws::Credentials.new(ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']),
})

S3_BUCKET = Aws::S3::Resource.new.bucket(ENV['S3_BUCKET_NAME'])

uploads_controller.rb

def set_s3_direct_post
  @s3_direct_post = S3_BUCKET.presigned_post(key: "uploads/#{SecureRandom.uuid}/${filename}", success_action_status: '201', acl: 'public-read')
end

I beleive it might have something to do with how the S3_BUCKET is called, but I've tried it several different ways and it comes back with the same error each time.

Answer 1

Alex, I ran into this same issue, and it turned out that the order of my initializers was off and my bucket.presigned_post was trying to execute on a null object (bucket). Take a look at this , and see if it doesn't help you.