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? ??? ??? MySQL ???? Find ???? ???? CakePHP?? ???? ????? ???? ??? ??????

Find ???? ???? CakePHP?? ???? ????? ???? ??? ??????

Dec 29, 2024 pm 07:52 PM

How to Efficiently Join Tables in CakePHP using the Find Method?

CakePHP? ?? ???? ??? ??

CakePHP ?? ???? ?? ????? ???? ????? ?? ??? ?????.

?? ???PHP ??

actAs ? hasMany ?? ownTo ??? ???? ?? ?? ??? ?????. ?:

class User extends AppModel {
    public $actsAs = ['Containable'];
    public $hasMany = ['Message'];
}

class Message extends AppModel {
    public $actsAs = ['Containable'];
    public $belongsTo = ['User'];
}

?? ?? ?? ??? ??? ?????.

$this->Message->find('all', [
    'contain' => ['User'],
    'conditions' => ['Message.to' => 4],
    'order' => 'Message.datetime DESC'
]);

??? ?? ??

?? ?? ??? ??? ?? ??? ?????. :

$this->Message->find('all', [
    'joins' => [
        [
            'table' => 'users',
            'alias' => 'UserJoin',
            'type' => 'INNER',
            'conditions' => ['UserJoin.id = Message.from']
        ]
    ],
    'conditions' => ['Message.to' => 4],
    'fields' => ['UserJoin.*', 'Message.*'],
    'order' => 'Message.datetime DESC'
]);

? ?? ??? ???? ??? ??

?? ??? ?? ? ??? ???? ???? ????? ??? ???? ?? ??? ??? ??????.

class User extends AppModel {
    public $actsAs = ['Containable'];
    public $hasMany = ['MessagesSent' => ['className' => 'Message', 'foreignKey' => 'from']];
    public $belongsTo = ['MessagesReceived' => ['className' => 'Message', 'foreignKey' => 'to']];
}

class Message extends AppModel {
    public $actsAs = ['Containable'];
    public $belongsTo = ['UserFrom' => ['className' => 'User', 'foreignKey' => 'from']];
    public $hasMany = ['UserTo' => ['className' => 'User', 'foreignKey' => 'to']];
}

? ??:

$this->Message->find('all', [
    'contain' => ['UserFrom'],
    'conditions' => ['Message.to' => 4],
    'order' => 'Message.datetime DESC'
]);

? ??? Find ???? ???? CakePHP?? ???? ????? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? ????? ??
? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

? AI ??

Undresser.AI Undress

Undresser.AI Undress

???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover

AI Clothes Remover

???? ?? ???? ??? AI ?????.

Video Face Swap

Video Face Swap

??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

???

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???++7.3.1

???? ?? ?? ?? ???

SublimeText3 ??? ??

SublimeText3 ??? ??

??? ??, ???? ?? ????.

???? 13.0.1 ???

???? 13.0.1 ???

??? PHP ?? ?? ??

???? CS6

???? CS6

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SublimeText3 Mac ??

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