Updated seed and model costumer association

app/models/job.rb

@@ -16,6 +16,7 @@ class Job < ApplicationRecord
   before_save :update_status_changed_at, if: :will_save_change_to_status?
   before_save :set_cost_qm
   before_save :calc_cost, if: :printed_pages_changes?
+  before_validation :set_costumer_infos
 
   # TODO: works only when job is created. Should move analyzer to activestorage :
   # https://discuss.rubyonrails.org/t/active-storage-in-production-lessons-learned-and-in-depth-look-at-how-it-works/83289
@@ -163,4 +164,9 @@ class Job < ApplicationRecord
     calc_cost
     save
   end
+
+  def set_costumer_infos
+    self.costumer_firstname = costumer.firstname if self.costumer_firstname.nil?
+    self.costumer_lastname = costumer.lastname if self.costumer_lastname.nil?
+  end
 end