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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_values.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