Halfway through table redesign, saving to revert to working version

app/models/id_card/employer_logo.rb

@@ -0,0 +1,14 @@
+class IdCard::EmployerLogo < ApplicationRecord
+  before_save :calculate_aspect_ratio, if: :image_data_changed?
+
+  private
+
+  def calculate_aspect_ratio
+    image_io = StringIO.new(self.image_data)
+    width, height = FastImage.size(image_io)
+    image_ratio = width.to_f / height
+    if image_ratio
+      self.aspect_ratio = image_ratio.round(2)
+    end
+  end
+end