保存 cakephp 2.0 关联

Question

我正在尝试将关联数据保存在 Cakephp 2.0 中，在数据库中我有两个表，表实体 (id, main_name) 和地址(id, entity_id, city)

在实体模型中我建立了关联：

public $hasMany = array(
    'Address' => array(
        'className'     => 'Address',
        'foreignKey'    => 'entity_id'
     )
);

在 AdressesController 中我保存了以下数据：

public function add() {
    if ($this->request->is('post')) {
        if($this->Entity->save($this->request->data)) {
            $this->Flash->success('Entity successfully registered!');
            $this->redirect(array('action' => 'add'));

        } else {
            $this->Flash->error(Oops, we could not register this entity! 
            Make sure it already exists.');
        }
    }
}

在视图中，我的表单如下所示：

<?php
    echo $this->Form->input(
        'Entity.main_name',
         array(
             'type'  => 'text',
             'class' => 'form-control',
             'label' => false
         )
    );
?>
<?php
    echo $this->Form->input(
        'Address.city',
        array(
             'type'  => 'text',
             'class' => 'form-control',
             'label' => false
        )
    );
?>

实体的数据正常保存在数据库中，但是没有关联entity_id，也没有把城市保存在addresses表中，是不是还要在controller中做其他事情？

Answer 1

有几种方法可以解决您的问题。如CakeBook: Saving your data 中所述，您可以使用saveAssociated() 或Save each Model step by step.

使用 saveAssociated() 保存

在你的Controller/EntitiesController.php：

public function add() {
    if ($this->request->is('post')) {
        $this->Entity->create();
        // Use saveAssociated() instead of save() here
        if ($this->Entity->saveAssociated($this->request->data)) {
            $this->Flash->success(__('The entity has been saved.'));
            return $this->redirect(array('action' => 'index'));
        } else {
            $this->Flash->error(__('The entity could not be saved. Please, try again.'));
        }
    }
    $addresses = $this->Entity->Address->find('all');
    $this->set($addresses);
}

在你的View/Entities/add.ctp：

<?php
    echo $this->Form->input('main_name', array(
        'type'  => 'text',
        'class' => 'form-control',
        'label' => false
    ));
    // Make sure you use Address.0.city
    echo $this->Form->input('Address.0.city', array(
            'type'  => 'text',
            'class' => 'form-control',
            'label' => false
    ));
?>

由于您使用 hasMany 关联，因此实体可以有多个地址。因此，您必须在Address.0.city 中设置0。这将产生一个像这样的数据数组：

array(
    'Entity' => array(
        'main_name' => 'Fancy Name'
    ),
    'Address' => array(
        (int) 0 => array(
            'city' => 'Cool City'
        )
    )
)

逐步保存模型

另一种方法是保存实体，然后使用 entity_id 保存地址，如CakeBook 中所述：

在你的Controller/EntitiesController.php:

public function add() {
    if (!empty($this->request->data)) {
        // save Entity
        $entity = $this->Entity->save($this->request->data);

        if (!empty($entity)) {
            // Set the EntityId to the data array and save the Address with the EntityId
            $this->request->data['Address']['entity_id'] = $this->Entity->id;
            $this->Entity->Address->save($this->request->data);
        }
    }
}

在这种情况下，您的View/Entities/add.ctp 地址表单如下所示：

echo $this->Form->input('Address.city', array(
        'type'  => 'text',
        'class' => 'form-control',
        'label' => false
));

最好的，变量