如何减少Cake 3.x中_joinData的字段数量？

Question

情况

运用 Cake 3.2.4

我有一张EventTicketSales桌子

那

  $this->belongsToMany('Approvings', [
        'className' => 'Contacts',
        'joinTable' => 'event_ticket_sales_approvings',
        'targetForeignKey' => 'contact_id',
        'saveStrategy' => 'replace',
    ]);

当我做这样的分页时:

       $this->paginate['contain'] = [
            'Approvings' => function (\Cake\ORM\Query $query) {
                return $query->select([
                    'Approvings.id',
                    'Approvings.name',
                    'Approvings.company',
                    'EventTicketSalesApprovings.event_ticket_sale_id'
                ]);
            }
        ];
        $this->paginate['fields'] = [
            'EventTicketSales.id', 'EventTicketSales.event_id', 'EventTicketSales.billing_amount_in_sgd', 
            'EventTicketSales.payment_terms', 'EventTicketSales.invoice_number', 
            'EventTicketSales.due_date',
        ];

我得到以下数据:

id: "06f39ba3-9a17-47c6-9374-24b49fb64665",
event_id: 7,
billing_amount_in_sgd: 7680.03,
payment_terms: "45 days",
invoice_number: "9191",
due_date: "2016-03-05T00:00:00+0800",
approvings: [
    {
        id: 63,
        name: "Jaime Jen",
        company: "Apple Company",
        _joinData: {
            contact_id: 63,
            id: 335,
            event_ticket_sale_id: "06f39ba3-9a17-47c6-9374-24b49fb64665",
            created: "2016-01-20T13:43:44+0800",
            modified: "2016-01-20T13:43:44+0800"
        }
    }
]

我想要的是

我还想控制从中检索的数据量 _joinData

理想情况下,我希望尽可能少的来自_joinData的字段.

id: "06f39ba3-9a17-47c6-9374-24b49fb64665",
event_id: 7,
billing_amount_in_sgd: 7680.03,
payment_terms: "45 days",
invoice_number: "9191",
due_date: "2016-03-05T00:00:00+0800",
approvings: [
    {
        id: 63,
        name: "Jaime Jen",
        company: "Apple Company",
        _joinData: {
            id: 335,
            contact_id: 63,
            event_ticket_sale_id: "06f39ba3-9a17-47c6-9374-24b49fb64665",
        }
    }
]

如果我能帮助它,我实际上甚至不需要_joinData.

Answer 1

例如,您可以迭代集合并删除您不感兴趣的属性,例如

$eventTicketSales->map(function ($row) {
    foreach ($row['approvings'] as &$approving) {
        unset($approving['_joinData']);
    }

    return $row;
});

或者,因为您似乎想要在JSON表示中应用它,您可以_joinData将Approving实体的属性标记为隐藏,因为您通常希望在将实体转换为数组或JSON时丢弃该属性

$query->formatResults(function (\Cake\Collection\CollectionInterface $results) {
    return $results->map(function ($row) {
        foreach ($row['approvings'] as &$approving) {
            unset($approving['_joinData']);
        }

        return $row;
    });
});

也可以看看

• 食谱>收藏
• Cookbook>数据库访问和ORM>查询生成器>查询是集合对象
• Cookbook>数据库访问和ORM>实体>转换为数组/ JSON>隐藏属性