如何在CodeIgniter中使用Activerecord插入表中連接其他表？

Question

我是CodeIgniter和ORM的新手，我希望你們能幫助我。

的問題表：

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; 

回答表：

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?')); 

任何人都可以告訴我如何做到同樣的事情，但使用CodeIgniter的Activerecord？

Answer 1

不要這樣做，而是使用主鍵（id）直接插入到基表中。