在制作 PHP 数据库驱动的多项选择测验时遇到了麻烦

Question

所以我的目标听起来很简单，我需要做一个数据库驱动的多项选择测验 CMS 添加到我的项目中。我需要能够按类别创建测验，每个测验添加 10 个问题，以及 4 个问题和 1 个答案。我在两个方面遇到了麻烦。

1. 数据库结构。如何构建我的数据库以便我可以做到这一点？例如，每个问题、question_answers 和测验的表格？

2. 用户完成测验后，我想获取分数并将其存储到自己的表中。我知道如何将分数存入数据库，但我将如何显示测验、相应的问题、相应的答案以及正确的答案以及右侧的单选按钮？

这对我来说很棘手，但对你们中的一些天才来说可能不是。

最好的问候，

肖恩

Answer 1

为您单击了此表结构。外键约束是可选的。

CREATE TABLE IF NOT EXISTS `answer` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `question_id` int(10) unsigned NOT NULL,
  `answer` varchar(100) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `question_id` (`question_id`)
) ENGINE=InnoDB ;

CREATE TABLE IF NOT EXISTS `question` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `quiz_id` int(10) unsigned NOT NULL,
  `question` varchar(500) NOT NULL,
  `correct_anwer_id` int(10) unsigned NOT NULL,
  PRIMARY KEY (`id`),
  KEY `quiz_id` (`quiz_id`,`correct_anwer_id`),
  KEY `correct_anwer_id` (`correct_anwer_id`)
) ENGINE=InnoDB ;

CREATE TABLE IF NOT EXISTS `quiz` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `category` int(10) unsigned NOT NULL,
  `title` varchar(100) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB ;

ALTER TABLE `answer`
  ADD CONSTRAINT `answer_ibfk_1` FOREIGN KEY (`question_id`) REFERENCES `question` (`id`);

ALTER TABLE `question`
  ADD CONSTRAINT `question_ibfk_2` FOREIGN KEY (`correct_anwer_id`) REFERENCES `answer` (`id`),
  ADD CONSTRAINT `question_ibfk_1` FOREIGN KEY (`quiz_id`) REFERENCES `quiz` (`id`);

为了存储测试，用户已经采取了：

CREATE TABLE IF NOT EXISTS `test` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` int(10) unsigned NOT NULL,
  `quiz_id` int(10) unsigned NOT NULL,
  `date_taken` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `score` mediumint(9) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `quiz_id` (`quiz_id`)
) ENGINE=InnoDB ;

CREATE TABLE IF NOT EXISTS `test_answer` (
  `test_id` int(10) unsigned NOT NULL,
  `question_id` int(10) unsigned NOT NULL,
  `answer_id` int(10) unsigned NOT NULL,
  `single_score` mediumint(9) NOT NULL,
  PRIMARY KEY (`test_id`,`question_id`),
  KEY `question_id` (`question_id`),
  KEY `answer_id` (`answer_id`)
) ENGINE=InnoDB ;

ALTER TABLE `test`
  ADD CONSTRAINT `test_ibfk_1` FOREIGN KEY (`quiz_id`) REFERENCES `quiz` (`id`);

ALTER TABLE `test_answer`
  ADD CONSTRAINT `test_answer_ibfk_3` FOREIGN KEY (`answer_id`) REFERENCES `answer` (`id`),
  ADD CONSTRAINT `test_answer_ibfk_1` FOREIGN KEY (`test_id`) REFERENCES `test` (`id`),
  ADD CONSTRAINT `test_answer_ibfk_2` FOREIGN KEY (`question_id`) REFERENCES `question` (`id`);

一些示例数据可供使用：

INSERT INTO `answer` (`id`, `question_id`, `answer`) VALUES
(3, 1, 'stackoverflow.com '),
(4, 1, 'example.com');

INSERT INTO `question` (`id`, `quiz_id`, `question`, `correct_anwer_id`) VALUES
(6, 1, 'What is the best website on the whole internet?', 3);

INSERT INTO `quiz` (`id`, `category`, `title`) VALUES
(1, 1337, 'My Great Quiz. Take me!');