add for every serialized attribute a coder

app/models/invoice.rb

@@ -4,7 +4,7 @@ class Invoice < ApplicationRecord
   self.belongs_to_required_by_default = false
 
   belongs_to :order, class_name: 'Spree::Order'
-  serialize :data, Hash
+  serialize :data, Hash, coder: YAML
   before_validation :serialize_order
   after_create :cancel_previous_invoices
   default_scope { order(created_at: :desc) }

app/models/report_rendering_options.rb

@@ -4,5 +4,5 @@ class ReportRenderingOptions < ApplicationRecord
   self.belongs_to_required_by_default = false
 
   belongs_to :user, class_name: "Spree::User"
-  serialize :options, Hash
+  serialize :options, Hash, coder: YAML
 end

app/models/spree/preference.rb

@@ -2,8 +2,7 @@
 
 module Spree
   class Preference < ApplicationRecord
-    serialize :value
-
+    serialize :value, coder: YAML
     validates :key, presence: true
     validates :value_type, presence: true