My table structure is like this:
invoices:
id, title, desciption, total_amount, --
products:
id, name, price, --
invoice_products
id, invoice_id, product_id, --
One invoice can have multiple products, so,
I created an invoice with products, then data fills according to above DB structure.
When i update invoice (let say invoice_id = 2 ), then, i am confused what is the best way to update "invoice_products" table.
My approach is ( for "invoice_products" table):
I think this is not good approach, as i am force deleting the rows in "invoice_products" and again inserting new updated products.
is there any way to do via eloquent ?
I think invoice_products is pivot table. You should use sync method.
$productIds = [1,2,3];
$Invoice->products()->sync($productIds);
Also in your invoice Model the relationship should be like this
public function products()
{
return $this->belongsToMany(Invoice::class, 'invoice_products', 'invoice_id', 'product_id');
}
You can use Laravel many to many relation to achieve this functionality:
Invoice Model
public function products()
{
return $this->belongsToMany('App\Product', 'invoice_products');
}
Product Model
Though it is not required here but you can use this to get invoice for related products.
public function invoices()
{
return $this->belongsToMany('App\Product', 'invoice_products');
}
To update the existing data you can use sync
method:
$products = [1, 2, 3, 4];
$invoice->products()->sync($products);
You can read more about relationship over https://laravel.com/docs/5.7/eloquent-relationships
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