无法创建表 (errno 150) Openshift 的 phpmyadmin

Question

这是我的模式：

-- Table 'users'
CREATE TABLE IF NOT EXISTS `users` (
  `ID` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) COLLATE utf8_bin NOT NULL,
  `password` varchar(100) COLLATE utf8_bin NOT NULL,
  `registrationDate` datetime NOT NULL,
  PRIMARY KEY (`ID`),
  UNIQUE KEY `name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=1;
CREATE TABLE IF NOT EXISTS tasks (
  id bigint(20) NOT NULL AUTO_INCREMENT,
  description TEXT,
  title TEXT,
  type TEXT,
  createdDate DATETIME NOT NULL,
  finishedDate DATETIME,
  user_id bigint(20) NOT NULL,
  PRIMARY KEY (id),
  CONSTRAINT user_fk FOREIGN KEY (user_id) REFERENCES USERS(ID) ON DELETE CASCADE
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=1;

当我尝试创建"tasks"表时，错误号一直是150。

Answer 1

看起来openshift上的phpmyadmin是区分大小写的，如果你深入研究错误，你会得到这个：

LATEST FOREIGN KEY ERROR
------------------------
140827 10:52:57 Error in foreign key constraint of table testing/tasks:
 FOREIGN KEY (user_id) REFERENCES USERS(ID) ON DELETE CASCADE
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=1:
Cannot resolve table name close to:
(ID) ON DELETE CASCADE
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=1

在下面的代码中，请注意，在REFERENCES之后的第二个表创建代码中，我将USERS更改为USERS
看起来这个代码有效：

CREATE TABLE IF NOT EXISTS `users` (
  `ID` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) COLLATE utf8_bin NOT NULL,
  `password` varchar(100) COLLATE utf8_bin NOT NULL,
  `registrationDate` datetime NOT NULL,
  PRIMARY KEY (`ID`),
  UNIQUE KEY `name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=1;
CREATE TABLE IF NOT EXISTS tasks (
  id bigint(20) NOT NULL AUTO_INCREMENT,
  description TEXT,
  title TEXT,
  type TEXT,
  createdDate DATETIME NOT NULL,
  finishedDate DATETIME,
  user_id bigint(20) NOT NULL,
  PRIMARY KEY (id),
  CONSTRAINT user_fk FOREIGN KEY (user_id) REFERENCES users(ID) ON DELETE CASCADE
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=1;