Laravel error: Property [name] does not exist on this collection instance - php

Question

I'm trying to get a partner for each order using Laravel resource collections. But this throws up an error:
Property [name] does not exist on this collection instance
I get partners this way
Order_product.php
//...
class Order_product extends Model
{
protected $fillable = ['order_id', 'product_id', 'quantity', 'price'];
public function partner()
{
return $this->hasManyThrough(
'App\Partner', 'App\Order',
'partner_id', 'id', 'order_id');
//orders partners order_products
}
//...
Resources\Order_product.php
class Order_product extends JsonResource
{
public function toArray($request)
{
return [
'id' => $this->id,
'order_id' => $this->order_id,
'product_id' => $this->product_id,
'quantity' => $this->quantity,
'price' => $this->price,
'status' => $this->order->status,
'product_name' => $this->prod->name,
//return error
'partner_name' => $this->partner->name,
];
/*
//this method return:
//Invalid argument supplied for foreach() {"exception":"[object]...
$partners = [];
foreach($this->collection as $partner) {
array_push($partners, [
// 'partner_name' => $this->partner->name
]);
}
return $partners;
*/
}
}
Each order has one partner name. In the future, I will group them, but now I just need to output the partner_name

Answer 1

is relations when you use hasMany or hasManyThrough it returns you a collection, so you should use it in foreach or use with index
return [
'product_name' => $this->prod->first()->name, //first array in collection using first()
];
OR
return [
'product_name' => $this->prod[0]->name, //first array in collection using index
];
or you can write this code in foreach!

Answer 2

As you are using hasManyThrough or hasMany laravel relationship returns Illuminate\Database\Eloquent\Collection Instance.
If you want to get name you have to have one Model instance.
Solution 1: $this->parthner->first()->name
Solution 2: See this hasOneThough
public function partner(){
return $this->hasOneThrough(
'App\Partner', 'App\Order',
'partner_id', 'id', 'order_id');
}
Depens on your app logic
Hope this helps you