Add logo field to ContentConfig

app/models/content_configuration.rb

@@ -1,4 +1,14 @@
+require 'open_food_network/paperclippable'
+
 class ContentConfiguration < Spree::Preferences::Configuration
+  # Header
+  include OpenFoodNetwork::Paperclippable
+  preference :logo_file_name, :string
+  preference :logo_content_type, :string
+  preference :logo_file_size, :integer
+  preference :logo_updated_at, :string
+  has_attached_file :logo
+
   # Home page
   preference :home_show_stats, :boolean, default: true
 

lib/open_food_network/paperclippable.rb

@@ -0,0 +1,35 @@
+# Allow use of Paperclip's has_attached_file on non-ActiveRecord classes
+# https://gist.github.com/basgys/5712426
+
+module OpenFoodNetwork
+  module Paperclippable
+    def self.included(base)
+      base.send :extend, ActiveModel::Naming
+      base.send :extend, ActiveModel::Callbacks
+      base.send :include, ActiveModel::Validations
+      base.send :include, Paperclip::Glue
+
+      # Paperclip required callbacks
+      base.send :define_model_callbacks, :save, only: [:after]
+      base.send :define_model_callbacks, :commit, only: [:after]
+      base.send :define_model_callbacks, :destroy, only: [:before, :after]
+    end
+
+    # ActiveModel requirements
+    def to_model
+      self
+    end
+
+    def valid?()      true end
+    def new_record?() true end
+    def destroyed?()  true end
+
+    def errors
+      obj = Object.new
+      def obj.[](key)         [] end
+      def obj.full_messages() [] end
+      def obj.any?()       false end
+      obj
+    end
+  end
+end