sql - 如何在 CodeIgniter 中使用 Activerecord 插入表连接其他表？

Question

我是 CodeIgniter 和 ORM 的新手，希望你们能帮助我。

问题表：

CREATE TABLE `question` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(128) NOT NULL DEFAULT '',
  `content` text NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

答案表：

CREATE TABLE `answer` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `question_id` int(11) unsigned NOT NULL,
  `content` text NOT NULL,
  PRIMARY KEY (`id`),
  KEY `question_id` (`question_id`),
  CONSTRAINT `answer_ibfk_1` FOREIGN KEY (`question_id`) REFERENCES `question` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

等效的 SQL 是：

INSERT INTO answer(content, question_id) 
VALUES('Ironman', (select id 
                     from question 
                    where title ='favourite characters' 
                      and content = 'Who is your favourite characters in Avanger?'));

任何人都可以告诉我如何实现相同的目标，但使用 CodeIgniter Activerecord？

Answer 1

不要那样做，而是使用主键 (id) 直接插入到基表中。