How to use attach with two tables and two connect in laravel? - laravel

Question

I use Laravel 8x, and i have two connections:
In .env :
DB_HOST=xx.xx.xx.xx
DB_PORT=xxxx
DB_DATABASE=product
DB_USERNAME=product_sp
DB_PASSWORD=xxxxxxxxx
DB_HOST_PROMOTION=xx.xx.xx.xx
DB_PORT_PROMOTION=xxx
DB_DATABASE_PROMOTION=product_sand
DB_USERNAME_PROMOTION=product_sp
DB_PASSWORD_PROMOTION=xxxxxxxxxxx
In model:
Product.php :
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notification;
class Product extends Model
{
use HasFactory;
protected $table = 'product';
protected $keyType = 'string';
public $incrementing = false;
public function discount()
{
return $this->belongsToMany(Discount::class, 'product_discount', 'productId', 'discountId')->withPivot(['id','status', 'quantity', 'createdAt', 'updatedAt', 'createdBy','updatedBy']);
}
}
discount.php :
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notification;
class Discount extends Model
{
use HasFactory;
protected $table = 'discount';
protected $connection = 'promotion';
protected $keyType = 'string';
public $incrementing = false;
}
The product_discount table is an intermediate table of discount and product.
In the controller, I use attach
public function store(Request $request)
{
$req = $request->all();
$product = new Product($req);
$extraFieldPivot = [
'id' => (string) Str::uuid(),
'status' => 1,
'quantity' => 1,
'createdAt' => now(),
'updatedAt' => now(),
];
$product->discount()->attach($req['idDiscount'], $extraFieldPivot)
}
But when I check the data. The result has not been saved to the database. So where did I go wrong, please advise me. Thank you very much.

Answer 1

i think your intermediate table needs to be changed like productId to product_id and discountId to discount_id.
and change your relationship according to your change in table
If your model relationship is correct change your store function to
$public function store(Request $request)
{
$req = $request->all();
$product = Product::create($req);
$extraFieldPivot = [
'id' => (string) Str::uuid(),
'status' => 1,
'quantity' => 1,
'createdAt' => now(),
'updatedAt' => now(),
];
$product->discount()->attach($product, $extraFieldPivot)
}