Fix CarrierWave file retrieval after store

lib/cloudinary/carrier_wave/process.rb

@@ -154,8 +154,16 @@ def format
     format = Cloudinary::PreloadedFile.split_format(original_filename || "").last
     return format || "" if resource_type == "raw"
     format = requested_format || format || default_format
- 
+
     format = format.to_s.downcase
     Cloudinary::FORMAT_ALIASES[format] || format
   end
+
+  def store!(new_file=nil)
+    super
+
+    column = model.send(:_mounter, mounted_as).send(:serialization_column)
+    identifier = model.send(:attribute, column)
+    retrieve_from_store!(identifier) unless identifier.nil?
+  end
 end

spec/carriewave.rb

@@ -0,0 +1,34 @@
+require 'spec_helper'
+require 'cloudinary'
+
+module CarrierWave
+  module Storage
+    class Abstract
+      def initialize(uploader)
+        @uploader = uploader
+      end
+
+      attr_accessor :uploader
+    end
+  end
+  class SanitizedFile; end
+end
+
+RSpec.describe Cloudinary::CarrierWave do
+  describe '#store!' do
+    let(:column) { 'example_field' }
+    let(:identifier) { 'identifier' }
+    let(:model) { double(:model, _mounter: mount) }
+    let(:mount) { double(:mount, serialization_column: column) }
+    let(:uploader) { spy(:uploader, model: model, mounted_as: :example).tap { |u| u.extend(Cloudinary::CarrierWave) } }
+
+    subject { uploader.store! }
+
+    it 'triggers `#retrieve_from_store!` after `#store!` executed to populate @file and @identifier' do
+      expect(model).to receive(:attribute).with(column).and_return(identifier)
+      expect(uploader).to receive(:retrieve_from_store!).with(identifier)
+
+      subject
+    end
+  end
+end