如何在CakePHP中设置模型关联？

Question

我想制作一个类似电子邮件的邮件系统，以便在Intranet上使用。数据库设计如下所示。 我想知道如何建立最好的模型关联。

CREATE TABLE IF NOT EXISTS `groups` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(60) NOT NULL,
  `created` datetime NOT NULL,
  `modified` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

CREATE TABLE IF NOT EXISTS `im_folders` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `user_id` int(11) NOT NULL,
  `created` datetime NOT NULL,
  `modified` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

CREATE TABLE IF NOT EXISTS `messages` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `subject` varchar(255) NOT NULL,
  `body` text,
  `user_id` int(11) NOT NULL,
  `created` datetime DEFAULT NULL,
  `modified` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

CREATE TABLE IF NOT EXISTS `users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `group_id` int(11) NOT NULL,
  `username` varchar(60) NOT NULL,
  `email` varchar(255) NOT NULL,
  `password` varchar(60) NOT NULL,
  `name` varchar(255) NOT NULL,
  `firstname` varchar(255) NOT NULL,
  `lastname` varchar(255) NOT NULL,
  `created` datetime NOT NULL,
  `modified` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

CREATE TABLE IF NOT EXISTS `users_messages` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `message_id` int(11) NOT NULL,
  `im_folder_id` int(11) NOT NULL,
  `IsSender` tinyint(1) NOT NULL,
  `IsRead` tinyint(1) NOT NULL,
  `IsStarred` tinyint(1) NOT NULL,
  `IsDeleted` tinyint(1) NOT NULL,
  `created` datetime NOT NULL,
  `modified` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

Answer 1

因此，您在users_messages表中添加了其他信息，因此它不适用于普通的HABTM。您需要创建另一个模型UsersMessage.php

您的模型关联可能看起来像（如果我不错过任何一点） -

Group.php

public $hasMany = array('User');

ImFolder.php

public $belongsTo = array('User');
public $hasMany = array('UsersMessage');

Message.php

public $belongsTo = array('User');
public $hasMany = array('UsersMessage');

user.php的

public $belongsTo = array('Group');
public $hasMany = array('UsersMessage');

UsersMessage.php

public $useTable = 'users_messages';

public $belongsTo = array('User', 'Message', 'ImFolder');

有关详细信息，请参阅 - hasMany through (The Join Model)