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? PHP ????? Laravel Laravel?? ??? ???? ???? ??

Laravel?? ??? ???? ???? ??

May 20, 2023 pm 06:53 PM

Laravel??? ???? ???? ???? ?? ??? ??????? ???? ?? ??? ???, ??? ??? ?? ??????. ??? ??? ??? ?? ?? ??? ?? ??? ?????. ?? ????? ?? ??? ???? ? ?? ??? ?? ?? ??? ???? ??? ??? ?? ? ?? ???? ???? ????? ???? ? ?????.

Laravel??? Eloquent ORM? ???? ??? ?? ??? ??? ? ????. ????? Laravel?? Eloquent ??? ???? ? ??? ?? ??? ??? ???? ??? ??? ???????.

  1. 3?? ??? ???

?? ?? ???, ?? ???, ?? ??? ?? ? ?? ??? ? 3?? ???? ????? ???. ?? ???? ???? ??? ????.

?? ???: users

id name email
1 Tom tom@laravel.com
2 Jerry jerry@laravel.com
3 Bob bob@laravel.com

?? ???: ??

id order_no user_id
1 1001 1
2 1002 2
3 1003 3
4 1004 1

?? ??? ?? ? ?? ??? :order_items

id order_id product_name
1 1 apple
2 1 ???
3 2 pear
4 4 orange
5 4 grape
  1. Laravel ?? ???

Laravel??? ? ?? ??? ???? ???. ?? ???. ??? ??? ? ?? ?? ??? ???? ???.

?? ??? ??: User

class User extends Model
{
    public function orders()
    {
        return $this->hasMany(Order::class);
    }
}

?? ??? ??: Order

class Order extends Model
{
    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function items()
    {
        return $this->hasMany(OrderItem::class);
    }
}

?? ??? ?? ? ?? ??? ??: OrderItem

class OrderItem extends Model
{
    public function order()
    {
        return $this->belongsTo(Order::class);
    }
}
  1. ??? ?? ??

Laravel??? Eloquent ORM? ???? ??? ??? ? ????. ??? ?? ??? ?????. ??? ???? ?? ??? ?? ???? ??? ?? ??? ???? ?? ?????.

$user = User::find(1);

foreach ($user->orders as $order) {
    echo $order->order_no;

    foreach ($order->items as $item) {
        echo $item->product_name;
    }
}

? ??? ??? Tom? ?? ??? ?? ???? ??? ?? ??? ?????.

?? Eloquent? ??? ?? ?? ???? ?? ???? ???, ?? ?? ? ? ??? ?? ?? ?? ??? ??? ? ????.

$user = User::with('orders.items')->find(1);

foreach ($user->orders as $order) {
    echo $order->order_no;

    foreach ($order->items as $item) {
        echo $item->product_name;
    }
}

? ??? ??? Tom? ?? ??? ? ??? ?? ?? ?? ??? ?????. ?? ??? ?? ? ??? ??? ? ????.

  1. Summary

Laravel??? Eloquent ORM? ???? ??? ?? ??? ?? ???? ??? ? ????. ??? ??? ???? ??? ?? ??? ??? ?? ???? ?? ?? ? ????. ??? ?? ?? ?? ??? ???? ?? ??? ????? ??????? ?? ????? ????? ?? ?? ????.

? ??? Laravel?? ??? ???? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? ????? ??
? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.

? AI ??

Undresser.AI Undress

Undresser.AI Undress

???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover

AI Clothes Remover

???? ?? ???? ??? AI ?????.

Video Face Swap

Video Face Swap

??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

???

??? ??

???++7.3.1

???++7.3.1

???? ?? ?? ?? ???

SublimeText3 ??? ??

SublimeText3 ??? ??

??? ??, ???? ?? ????.

???? 13.0.1 ???

???? 13.0.1 ???

??? PHP ?? ?? ??

???? CS6

???? CS6

??? ? ?? ??

SublimeText3 Mac ??

SublimeText3 Mac ??

? ??? ?? ?? ?????(SublimeText3)

???

??? ??

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