Error When Uploading to S3 via Carrierwave and Fog - ruby-on-rails

Question

So I'm trying to use Carrierwave and Fog to upload files to Amazon S3. I first set up Carrierwave working with the local file server. Worked golden. Then I tried adding the fog gem, switching the storage to fog and adding the carrier_wave.rb initializer file and I get the error "no implicit conversion of Array into String" when I try to upload anything.
My initializer code is:
CarrierWave.configure do |config|
config.fog_credentials = {
# Configuration for Amazon S3
:provider => 'AWS',
:aws_access_key_id => ['XXXX'],
:aws_secret_access_key => ['XXXX']
}
config.fog_directory = ['XXXX']
end
And my uploader code is:
class MediaUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
include CarrierWave::MimeTypes
process :set_content_type
process :save_content_type_and_size_in_model
def save_content_type_and_size_in_model
model.content_type = file.content_type if file.content_type
model.file_size = file.size
end
storage :fog
The error seems to be stemming from the fact that carrierwave & fog is trying to pass an array into my string "media" field in my model (project). See the parameters being passed in:
{"utf8"=>"✓",
"authenticity_token"=>"XXXXXX",
"project"=>{"name"=>"Cat",
"description"=>"Meow meow",
"media"=>#<ActionDispatch::Http::UploadedFile:0x007fd15513f3e8 #tempfile=# <Tempfile:/var/folders/8_/77fwkkc56r71w67p2jj5x9200000gn/T/RackMultipart20141004-77510-1k6nxyw>,
#original_filename="SG Square.jpg",
#content_type="image/jpeg",
#headers="Content-Disposition: form-data; name=\"project[media]\"; filename=\"SG Square.jpg\"\r\nContent-Type: image/jpeg\r\n">},
"commit"=>"Create Project"}
Help!