pravidlo

        {
                name => 'post',
                ignore_missing => 1,
                params => {
                        subject => {
                                required => 1,
                                length_between => [3, 40],
                        },
                        day => {
                                required => 0,
                                integer => 1,
                                value_between => [1, 31],
                        },
                        mon => {
                                required => 0,
                                integer => 1,
                                value_between => [1, 12],
                        }
        }