style template show page

app/models/submission.rb

@@ -4,22 +4,26 @@
 #
 # Table name: submissions
 #
-#  id          :bigint           not null, primary key
-#  deleted_at  :datetime
-#  created_at  :datetime         not null
-#  updated_at  :datetime         not null
-#  template_id :bigint           not null
+#  id                 :bigint           not null, primary key
+#  deleted_at         :datetime
+#  created_at         :datetime         not null
+#  updated_at         :datetime         not null
+#  created_by_user_id :bigint
+#  template_id        :bigint           not null
 #
 # Indexes
 #
-#  index_submissions_on_template_id  (template_id)
+#  index_submissions_on_created_by_user_id  (created_by_user_id)
+#  index_submissions_on_template_id         (template_id)
 #
 # Foreign Keys
 #
+#  fk_rails_...  (created_by_user_id => users.id)
 #  fk_rails_...  (template_id => templates.id)
 #
 class Submission < ApplicationRecord
   belongs_to :template
+  belongs_to :created_by_user, class_name: 'User', optional: true
 
   has_many :submitters, dependent: :destroy