Question

我有一个关联的数据数组，需要使用关联数组值进行分组。

$data = Array
(
    [0] => Array
    (
        [App] => Array
        (
            [id] => 12
            [user_id] => 121
            [skill] => Baking Cakes
        )
        [Project] => Array
        (
            [id] => 12
            [name] => P1
        )
        [User] => Array
        (
            [id] => 121
            [name] => Gwoo the Kungwoo
            [created] => 2007-05-01 10:31:01
        )
    ),
    [1] => Array
    (
        [App] => Array
        (
            [id] => 15
            [user_id] => 121
            [skill] => Baking Cakes
        )
        [Project] => Array
        (
            [id] => 13
            [name] => P2
        )
        [User] => Array
        (
            [id] => 121
            [name] => Gwoo the Kungwoo
            [created] => 2007-05-01 10:31:01
        )
    )
)

是否可以使用Hash实用程序使用User.id对数组进行分组？像这样：

Array
(
    [121] = Array
    (
        [0] => Array
        (
            [App] => Array
            (
                [id] => 12
                [user_id] => 121
                [skill] => Baking Cakes
            )
            [Project] => Array
            (
                [id] => 12
                [name] => P1
            )
            [User] => Array
            (
                [id] => 121
                [name] => Gwoo the Kungwoo
                [created] => 2007-05-01 10:31:01
            )
        ),
        [1] => Array
        (
            [App] => Array
            (
                [id] => 15
                [user_id] => 121
                [skill] => Baking Cakes
            )
            [Project] => Array
            (
                [id] => 13
                [name] => P2
            )
            [User] => Array
            (
                [id] => 121
                [name] => Gwoo the Kungwoo
                [created] => 2007-05-01 10:31:01
            )
        )
    )
)

我尝试了几个方法Hash :: combine（），Hash :: extract但是无法实现它。有人可以有一个想法。

提前致谢！

Answer 1

以下行将生成一个类似于您需要的数组：

$result=Hash::combine($data, '{n}.App.id', '{n}','{n}.User.id');

除了嵌套数字索引保存App.id中存储的数字而不是顺序数字索引。

如果App.id在结果集中是唯一的，那么这将有效。或者，您可以将Project.id用作$keyPath。

参考：

Hash::combine()

Answer 2

要改善@Inigo Flores的答案，可以通过将第二个参数设置为null来获得索引而不是关联的索引：

$result=Hash::combine($data, null, '{n}','{n}.User.id');

CakePHP Hash按值组合组数组

2 个答案: