Enable soft_deletion of Poll::Translations

db/migrate/20190121122946_add_hidden_at_to_poll_translations.rb

@@ -0,0 +1,6 @@
+class AddHiddenAtToPollTranslations < ActiveRecord::Migration[4.2]
+  def change
+    add_column :poll_translations, :hidden_at, :datetime
+    add_index :poll_translations, :hidden_at
+  end
+end

db/schema.rb

@@ -1223,6 +1223,8 @@ ActiveRecord::Schema.define(version: 20190607160900) do
     t.string   "name"
     t.text     "summary"
     t.text     "description"
+    t.datetime "hidden_at"
+    t.index ["hidden_at"], name: "index_poll_translations_on_hidden_at", using: :btree
     t.index ["locale"], name: "index_poll_translations_on_locale", using: :btree
     t.index ["poll_id"], name: "index_poll_translations_on_poll_id", using: :btree
   end

spec/models/poll/poll_spec.rb

@@ -6,6 +6,7 @@ describe Poll do
 
   describe "Concerns" do
     it_behaves_like "notifiable"
+    it_behaves_like "acts as paranoid", :poll
     it_behaves_like "reportable"
   end