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Containable不会使用HABTM和hasMany过滤二级模型

containable has-and-belongs-to-many filter cakephp

0

Myer · 技术社区 · 15 年前

我所拥有的:

"A" HABTM "C" HABTM "A" through join table "B"
"A" hasMany "B" belongsTo "A"
"C" is ordered by a "B" field

我想要的是:

// result:
[0] => array( 
    A => array( /* single model's fields I still need*/ ),
    C => array(
        [0] => array( C.field1, C.field2, ... /* Model C fields*/ ), 
        [1] => array( C.field1, C.field2, ... )
    )
)

我试过的:

// this gives me data I don't need:
A->find('all', array( 'conditions' => array( 'id' => $id ) ) )
// result:
[0] => array( 
    A => array( /* single model's fields I need*/ ),
    B => array( /* I DON'T NEED */
        [0] => array( ... )
        [1] => array( /* ... etc, tons records I don't need */ )
    ),
    C => array(
        [0] => array( C.field1, C.field2, ... /* I need these fields*/ 
            [B] => array( /* I DON'T NEED */ )
        ),
        [1] => array( C.field1, C.field2, ...  )
            [B] => array( /* ... etc, each has a model B I don't need ... */)
        )
    )
)

使用Containable,我可以大大减少查询,但仍然有相关的模型cruft:

// this is a little better
A->find('all', array( 
    'conditions' => array( 'id' => $id ),
    'contain' => array( 'C' )
))
// result:
[0] => array( 
    A => array( /* single model's fields I still need*/ ),
    C => array(
        [0] => array( C.field1, C.field2, ... /* I still need Model C fields*/ 
            [B] => array( /* I still DON'T need this Model's fields */ )
        ),
        [1] => array( C.field1, C.field2, ... 
            [B] => array( /* ... still has unneeded model B */)
        )
    )
)

NB1公司 :我读过 this , this ,和 this 从书上,以及 this 和 this .

NB2型 :我也试过

C->recursive = -1 // no effect

C->unbindModel(array('hasAndBelongsToMany'=>A)) // no effect

A->find('all', array(                    // not what I want, but it's still 
    'conditions' => array('id' => $id),  // odd that this doesn't filter C's 
    'contain' => array('A.B')));         // fields out. same as second result

A->find('all', array(                    // also not what I want, but it's 
    'conditions' => array('id' => $id),  // weird that this doesn't filter B's 
    'contain' => array('A.B.field')));   // fields at all;

1 回复 | 直到 9 年前

1

RabidFire 15 年前

ContainableBehavior将自动返回映射结果所需的字段。

引用自 page 你已经读过:

$this->Post->find('all', array('contain' => 'Comment.author'));

... // data returned:

[Comment] => Array
    (
        [0] => Array
            (
                [author] => Daniel
                [post_id] => 1
            )
...

如您所见,注释数组只包含author字段(加 CakePHP所需的post_id 以映射结果)。

在HABTM关系的情况下,会返回带有相关外键的连接模型,因为 a_id 和 c_id 字段是Containable所必需的。我的建议是忽略它,接受你需要的价值观。如果你愿意,你可以看看 joins 因为Containable有时会多次查询数据库。但是,关联模型的数据将不会像可包含的那样被很好地返回。