How to save array data from multiple select in Laravel using Eloquent - php

Question

i'd like to save data from multiple select to the database. So a user can choose more than one products in a multiple select. I've tried the code like below but i got this error "ErrorException Array to string conversion".
Here is my blade.php
<div class="form-group row" style="display:none;" id="inputbarang">
<label class="col-form-label col-lg-3 col-sm-12">Barang</label>
<div class="col-lg-4 col-md-9 col-sm-12">
<select class="form-control m-select2" width="500px" id="kt_select2_1" name="id_product[]" multiple="multiple">
<option value=""></option>
#foreach($produk as $p)
<option value="{{ $p->id }}">{{ $p->product }}</option>
#endforeach
</select>
</div>
</div>
and here is my controller
$id_promo = Promo::select('id')
->where('delete', 0)->orderBy('created_at', 'DESC')
// ->take(1)
->pluck('id')->first();
$id_product = [];
$id_product[] = $request->id_product;
// $id_products = $id_product['id_product'];
foreach ($id_product as $i) {
DetailPromo::create([
'id_promo' => $id_promo,
'id_product' => $i,
'det_potongan' => $request->potongan,
'det_jumlah_potongan' => $request->jumlah_potongan
]);
}
Any helps will be appreciated, thank you so much

Answer 1

Try below code:
$id_promo = Promo::select('id')
->where('delete', 0)
->orderBy('created_at', 'DESC')
// ->take(1)
->pluck('id')
->first()
;
$id_products = $request->id_product;
foreach ($id_products as $id_product) {
DetailPromo::create([
'id_promo' => $id_promo,
'id_product' => $id_product,
'det_potongan' => $request->potongan,
'det_jumlah_potongan' => $request->jumlah_potongan
]);
}