Enable soft deletion of Proposal::Translations

db/migrate/20190123122511_add_hidden_at_to_proposal_translations.rb

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

db/schema.rb

@@ -1318,6 +1318,8 @@ ActiveRecord::Schema.define(version: 20190607160900) do
     t.text     "description"
     t.text     "summary"
     t.text     "retired_explanation"
+    t.datetime "hidden_at"
+    t.index ["hidden_at"], name: "index_proposal_translations_on_hidden_at", using: :btree
     t.index ["locale"], name: "index_proposal_translations_on_locale", using: :btree
     t.index ["proposal_id"], name: "index_proposal_translations_on_proposal_id", using: :btree
   end

spec/models/proposal_spec.rb

@@ -10,6 +10,7 @@ describe Proposal do
     it_behaves_like "map validations"
     it_behaves_like "globalizable", :proposal
     it_behaves_like "sanitizable"
+    it_behaves_like "acts as paranoid", :proposal
   end
 
   it "is valid" do