zammad/db/migrate/20191017122807_add_foreign_key_constraint_to_active_storage_attachments_for_blob_id.active_storage.rb

# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/

# This migration comes from active_storage (originally 20180723000244)
class AddForeignKeyConstraintToActiveStorageAttachmentsForBlobId < ActiveRecord::Migration[6.0]
  def up
    return if foreign_key_exists?(:active_storage_attachments, column: :blob_id)

    return if !table_exists?(:active_storage_blobs)

    add_foreign_key :active_storage_attachments, :active_storage_blobs, column: :blob_id
  end
end