How to resolve “Missing Credentials” with Paperclip and s3 storage in rails 3

Question

I have a pretty straightforward model and attachment

has_attached_file :upload,
    :storage => :s3,
       :bucket => \'bestofbauer\',
       :s3_cred         


        

Answer 1

You need to set your environment variables. Here's two different ways to do it:

1. Every time you run rails server or any other command that accesses your S3 account you need to include your keys:

   $ MyAccessKEY=ACCESS_KEY MySecretKEY=SECRET_KEY rails server
   

2. I'm assuming you're using bash so edit your ~/.bash_rc or ~/.bash_profile to set your environment variables

   export MyAccessKEY=ACCESS_KEY
   export MySecretKEY=SECRET_KEY
   

   Then open a new terminal window and double-check that they're set

   $ echo $MyAccessKey
   > ACCESS KEY PRINTS OUT HERE
   

If you're deploying to Heroku then you'll want to provide your environment variables there as well:

$ heroku config:add MyAccessKEY=ACCESS_KEY MySecretKEY=SECRET_KEY

You can review your Heroku config:

$ heroku config

It will list out all of the config variables you have for that app.

You'll probably want to put your S3 bucket name in an ENV setting as well so you don't mess up your bucket when testing locally.