How to loop through a controller based on product_id in Laravel - laravel

Question

I have these models in my Laravel-5.8
Product Model:
class Product extends Model
{
protected $fillable = [
'id',
'name',
];
public function invoice(){
return $this->belongsToMany('App\Invoice');
}
}
Invoice Model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Invoice extends Model
{
protected $fillable = [
'id',
'customer_id',
'product_id',
'invoice_date',
'qty',
'price',
];
public function customer(){
return $this->belongsTo('App\Customer');
}
public function product(){
return $this->belongsToMany('App\Product');
}
}
Each invoice has one or more products.
Invoice Controller
public function create()
{
$customers = Customer::all();
$products = Product::all();
return view('invoice.create', compact('customers','products'));
}
public function store(Request $request)
{
$request->validate([
'customer_id' => 'required',
'product_id' => 'required',
'qty' => 'required',
'price' => 'required',
]);
$invoice = new Invoice();
$invoice->customer_id = $request->customer_id;
.....
return redirect('invoice/'.$invoice->id)->with('message','invoice created Successfully');
}
Invoice: create.blade
<form method="POST" action="{{route('invoice.store')}}">
#csrf
<div class="form-group col-md-3">
<label class="control-label">Customer Name</label>
<select name="customer_id" class="form-control">
<option>Select Customer</option>
#foreach($customers as $customer)
<option name="customer_id" value="{{$customer->id}}">{{$customer->name}} </option>
#endforeach
</select> </div>
<div class="form-group col-md-3">
<label class="control-label">Date</label>
<input name="invoice_date" class="form-control datepicker" value="<?php echo date('Y-m-d')?>" type="date" placeholder="Enter date">
</div>
<table class="table table-bordered">
<thead>
<tr>
<th scope="col">Product Name</th>
<th scope="col">Qty</th>
<th scope="col">Price</th>
</tr>
</thead>
<tbody>
<tr>
<td><select name="product_id[]" class="form-control productname" >
<option>Select Product</option>
#foreach($products as $product)
<option name="product_id[]" value="{{$product->id}}">{{$product->name}}</option>
#endforeach
</select></td>
<td><input type="text" name="qty[]" class="form-control qty" ></td>
<td><input type="text" name="price[]" class="form-control price" ></td>
</tr>
</tbody>
</table>
<div >
<button class="btn btn-primary" type="submit">Submit</button>
</div>
</form>
From the diagram below:
Product_id, qty, price are arrays.
I want the controller to iterate and count the number of products, then the rows of product_id, qty and price in the view will be based on count of products. And then everything will be saved in the invoice table.
How do I complete my store controller code to achieve this?

Answer 1

Try this :
$products = $request->get('product_id');
$qte = $request->get('qty');
$price = $request->get('price');
foreach($products as $key=>$product){
$invoice =Invoice::creeate([
'product_id' => $product,
'qte' => $qte[$key],
'price' => $price[$key],
...
]);
}