laravel - How to update data that is in array and save in another table?

Question

I want to update sku and color data .But My function only update of last array data When I do dd($request->all()) in update form

 "_token" => "6OmWbWhVTvyw4PXq1mhZbbcopMehx15pEjOJtWNz"
  "name" => "Jacket"
  "price" => "4000"
 
  "sku" => array:2 [▼
    0 => "057HJI"
    1 => "0KL780"
  ]
  "colour" => array:2 [▼
    0 => "Red"
    1 => "White"
  ]
  
]

In Product Controller update function.I want to update sku and colour data but when i clicked updated button,the whole data is comming of last array

   public function update(Request $request,Purchase $purchase)
    {

        $purchase->fill($request->all())->update();
    foreach($request->sku as $key => $attr)
        $purchase->productattribute()->update([
            'sku'=>$attr,
            'colour'=>$request->colour[$key];
            
        ]);

        return redirect()->back();
    }

This is my Product Model

 protected $fillable = ['name','price'];

 public function productattribute()
    {
        return $this->hasMany(ProductAttribute::class,'product_id');
    }

question from:https://stackoverflow.com/questions/65559657/how-to-update-data-that-is-in-array-and-save-in-another-table

Answer 1

Waitting for answers