DEV: Replace 'processed' column on notifications with new table (#11864)

db/migrate/20210105165605_add_processed_to_notifications.rb

@@ -1,14 +1,6 @@
 # frozen_string_literal: true
 
 class AddProcessedToNotifications < ActiveRecord::Migration[6.0]
-  def up
-    add_column :notifications, :processed, :boolean, default: false
-    execute "UPDATE notifications SET processed = true"
-    change_column_null(:notifications, :processed, false)
-    add_index :notifications, [:processed], unique: false
-  end
-
-  def down
-    remove_column :notifications, :processed
+  def change
   end
 end

db/migrate/20210126222142_create_shelved_notifications.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+class CreateShelvedNotifications < ActiveRecord::Migration[6.0]
+  def change
+    create_table :shelved_notifications do |t|
+      t.integer :notification_id, null: false
+    end
+    add_index :shelved_notifications, [:notification_id]
+  end
+end

db/post_migrate/20210127140730_undo_add_processed_to_notifications.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+class UndoAddProcessedToNotifications < ActiveRecord::Migration[6.0]
+  def up
+    execute "ALTER TABLE notifications DROP COLUMN IF EXISTS processed"
+  end
+end