module Trashable extend ActiveSupport::Concern included do default_scope { where(with_deleted_scope_sql) } # scope unscoped does not work belongs_to :deleted_by, class_name: 'User' end module ClassMethods def with_deleted # lifted from acts_as_paranoid, works around https://github.com/rails/rails/issues/4306 # # with this in place Post.limit(10).with_deleted, will work as expected # scope = self.all scope.where_clause.send(:predicates).delete(with_deleted_scope_sql) scope end def with_deleted_scope_sql all.table[:deleted_at].eq(nil).to_sql end end def trashed? deleted_at.present? end def trash!(trashed_by = nil) # note, an argument could be made that the column should probably called trashed_at # however, deleted_at is the terminology used in the UI # # we could hijack use a delete! and delete - redirecting the originals elsewhere, but that is # confusing as well. So for now, we go with trash! # trash_update(DateTime.now, trashed_by.try(:id)) end def recover! trash_update(nil, nil) end private def trash_update(deleted_at, deleted_by_id) # see: https://github.com/rails/rails/issues/8436 # # Fixed in Rails 4 # self.class.unscoped.where(id: self.id).update_all(deleted_at: deleted_at, deleted_by_id: deleted_by_id) raw_write_attribute :deleted_at, deleted_at raw_write_attribute :deleted_by_id, deleted_by_id end end