cakephp - 在 model::beforeSave 中添加关联数据

Question

我试图在 cakePHPs beforeSave() 期间添加相关数据，但看起来 cakePHP 忽略了它。

<?php
App::uses("AppModel", "Model");

class Recipe extends AppModel {
    public $hasMany = array('Ingredient');

    public function beforeSave($options=array()) {
        if(!isset($this->data["Ingredient"])) {
            Debugger::log("data[Ingredient] didn't exist! adding some ingredients...");
            $this->data["Ingredient"] = array(
                array(
                    'Ingredient' => array(
                        'name' => 'Gluten Free Flour',
                        'amount' => '12 cups'
                    )
                ),
                array(
                    'Ingredient' => array(
                        'name' => 'Sugar',
                        'amount' => '50 cups'
                    )
                ),
                array(
                    'Ingredient' => array(
                        'name' => 'A shoe',
                        'amount' => 'Just one'
                    )
                ),
            );
        }
        Debugger::log("Saving Data: ");
        Debugger::log($this->data, 7, 10);

        return true;
    }
}

在我的 RecipesController 中我有这个:

public function test_save() {
    //Test saving With the ingredients in the recipe
    Debugger::log("Saving w/ ingredients");
    Debugger::log($this->Recipe->saveAssociated(array(
        'Recipe' => array(
            'name' => 'Test Recipe 1'
        ),  
        'Ingredient' => array(
            array(
                'name' => 'Test Ingredient 1 for Test Recipe 1',
                'amount' => 'a few'
            ),  
            array(
                'name' => 'Test Ingredient 2 for Test Recipe 1',
                'amount' => 'a lot'
            )   
        )   
    )));

    Debugger::log("Saving w/o ingredients");
    Debugger::log($this->Recipe->saveAssociated(array(
        'Recipe' => array(
            'name' => 'Test Recipe 2'
        )   
    )));
}

有食材的保存有效，无食材的保存无效，beforeSave返回前Recipe->data中的数据是这样的:

array(
    'Recipe' => array(
        'name' => 'Test Recipe 1'
    ),
    'Ingredient' => array(
        (int) 0 => array(
            'Ingredient' => array(
                'name' => 'Test Ingredient 1 for Test Recipe 1',
                'amount' => 'a few'
            )
        ),
        (int) 1 => array(
            'Ingredient' => array(
                'name' => 'Test Ingredient 2 for Test Recipe 1',
                'amount' => 'a lot'
            )
        )
    )
)

当在保存前添加成分时:

array(
    'Recipe' => array(
        'name' => 'Test Recipe 1'
    ),
    'Ingredient' => array(
        (int) 0 => array(
            'Ingredient' => array(
                'name' => 'Gluten Free Flour',
                'amount' => '12 cups'
            )
        ),
        (int) 1 => array(
            'Ingredient' => array(
                'name' => 'Sugar',
                'amount' => '50 cups'
            )
        ),
        (int) 2 => array(
            'Ingredient' => array(
                'name' => 'A shoe',
                'amount' => 'Just one'
            )
        )
    )
)

当我调用保存方法之前数据在数组中时，它会工作得很好，只有当我尝试在 beforeSave 中添加关联数据时。

Answer 1

来自文档:

Be sure that beforeSave() returns true, or your save is going to fail.

http://book.cakephp.org/2.0/en/models/callback-methods.html#beforesave

---

已编辑: 我测试了您的代码，您是对的，beforeSave() 中添加的相关数据被忽略了。发生这种情况是因为您无法在模型的 beforeSave() 中添加或修改相关数据。这意味着，在您的 Recipe 的 beforeSave() 中，您既不能添加成分，也不能修改您之前在 Controller 中附加到 Recipe 的成分。

在您的 Recipe 的 beforeSave() 中，您只能修改 Recipe 数据。

这是一个错误吗？根据 Mark Story(CakePHP 的创建者)的说法，事实并非如此:

Its a feature, as currently saveAll only lets you use beforeSave to modify the record that's about to be saved, not the full data set. I personally don't feel that should change, but its something that could be discussed.

这句话是关于saveAll()的，但重要的部分是他所说的关于beforeSave()的内容。检查完整线程:https://github.com/cakephp/cakephp/issues/1765