CakePHP 将模型关联添加到数据库表中

Question

我是 CakePHP 的新手，英语不是我的母语，所以如果我的问题不清楚，我深表歉意。不管怎样，我有两个模型：开发者和游戏。

<?php
class Developer extends AppModel
{
    var $name = 'Developer';
    var $belongsTo = array('Game');
}
?>

我怎样

<?php
class Game extends AppModel
{
    var $name = 'Game';
    var $hasMany = array('Developer');
}
?>

才能在表developer_games中添加一个新行，该表只有game_id和developer_id字段，表明游戏和开发者之间存在关系，而实际上不知道游戏和开发者的id，因为它们是在创建的同时。我认为 CakePHP 能够为我做到这一点，但它不会在developer_games 表中添加新行。保存数据后是否必须检索游戏和开发人员的“id”字段，然后手动将关系模型数据保存到developer_games表中？

这是我用来向数据库添加新游戏和开发人员的代码：

$data = $this->Game->saveAll(array(
    'Game' => array(
        'game_id' => $data['GameId'],
        'game_name' => $data['GameName'],
    ),
    'Developer' => array(
        'Developer' => array(
            'username' => $_POST['dev_username'],
            'password_hash' => $_POST['dev_password'],
        ),
    ),
));
$this->Game->saveAll($data);

如果我不清楚某些内容，请告诉我，我会澄清。我已经为这个问题苦苦挣扎了很长一段时间，所以我将不胜感激我能得到的任何帮助。谢谢！

Answer 1

如果我没理解错的话，逻辑图中游戏-开发者的关系是多对多的，那么应该是[游戏]-1:N-[分配]-N:1-[开发者]
这里分配的是你的“developer_games”表，我建议你重命名该表以方便

根据你的场景，推荐在CakePHP中实现3个模型类。

<?php
class Developer extends AppModel
{
    var $name = 'Developer';
    var $hasMany = array('Assignment');
}
?>

<?php
class Game extends AppModel
{
    var $name = 'Game';
    var $hasMany = array('Assignment');
}
?>

<?php
class Assignment extends AppModel
{
    var $name = 'Assignment';
    var $belongsTo = array('Game','Developer');
}
?>

这是添加新分配的代码

//retrieved submitted data --> $data
$data = $this->data;

// this is for the case you want to insert into 3 tables at a same time
$newGame = $this->Game->create();
$newGame = array(
    'Game'=> array(
        'name' => $data['Game']['name']
    )
);
$this->Game->save($newGame);
$newGameId = $this->Game->getLastInsertId();

$newDev = $this->Developer->create();
$newDev = array(
    'Developer'=> array(
        'name' => $data['Developer']['name']
    )
);
$this->Developer->save($newDev);
$newDevId = $this->Developer->getLastInsertId();

/**
* or if you already have Game Id, and Developer Id, then just load it on, and 
* put it in the statement below, to create a new Assignment
**/
$newAssignment = $this->Assignment->create();
$newAssignment = array(
    'Assignment' => array(
        'game_id' => $newGameId,
        'developer_id' => $newDevId,
    )
);
$this->Assignment->save($newAssignment);

Answer 2

请阅读以下内容：http://book.cakephp.org/view/1044/ hasAndBelongsToMany-HABTM
“hasAndBelongsToMany”是您想要的关系。 Cake 负责关联，您不需要连接表的模型。