Deposit datetime is renamed to initiated_at

db/migrate/20170302112312_remove_deposit_datetime_from_dossiers.rb

@@ -0,0 +1,8 @@
+class RemoveDepositDatetimeFromDossiers < ActiveRecord::Migration[5.0]
+  def change
+    Dossier.where.not(deposit_datetime: nil).each do |dossier|
+      dossier.update(initiated_at: dossier.deposit_datetime)
+    end
+    remove_column :dossiers, :deposit_datetime, :datetime
+  end
+end