Property [weight] does not exist on this collection instance.

Or show the content() method

@Sinnbeck Yes, there is a lot of information in the cart, but I only need the weight and the quantity. I'm at a total loss, considering that a die dump or a php echo of $carts clearly shows the data. You mentioned show content method. What exactly do you mean?

@newlaravelcoder 2 things

1. Show the result of the dd()
2. What does this do? Cart::content();

@Sinnbeck a die dump of Cart::content() does the same thing as the die dump of $carts. No difference.

Illuminate\Support\Collection {#1758 ▼
  #items: array:1 [▼
    "d7526188f20e4280f12c233cba5251ce" => Gloudemans\Shoppingcart\CartItem {#1755 ▼
      +rowId: "d7526188f20e4280f12c233cba5251ce"
      +id: "22"
      +qty: 6
      +name: "Prairie Sage Heritage Soap Bar"
      +price: 6.5
      +weight: 0.6
      +options: Gloudemans\Shoppingcart\CartItemOptions {#1756 ▼
        #items: array:3 [▼
          "image" => "images/products/1714987607816402.jpg"
          "color" => null
          "size" => null
        ]
        #escapeWhenCastingToString: false
      }
      +taxRate: 21
      -associatedModel: null
      -discountRate: 0
    }
  ]
  #escapeWhenCastingToString: false
}

@newlaravelcoder yes I know. I asked to see what it refers to. Anyways.. If you want the first cart, you can do

$parcel = array(
    'length'=> '6',
    'width'=> '5',
    'height'=> '5',
    'distance_unit'=> 'in',
    'weight'=> $carts->first()->weight,
    'mass_unit'=> 'lb',
);

@Sinnbeck Thanks for that. That works, but I feel that's not getting the appropriate weight. Right now I have six of the same item with a weight of 0.6, thus the total weight should be 3.6 libs. I tried to mimic your code like this

'weight'=> $carts->first()->weight * $carts-.>qty,

but it triggers an error

@newlaravelcoder if there is multiple, then use sum like snapey suggested

'weight'=> $carts->sum('weight') * $carts->sum('qty') 

@Snapey I need to plan for both contigencies, but right now, I only have six of the same item in the cart. The weight is the same at 0.6, but the total weight has to reflect the number of items in the cart. Yes $carts is a collection, but I'm at a loss of how to do this. I'm brand new to laravel and am learning on the fly. Any suggesstions?

@newlaravelcoder https://laravel.com/docs/8.x/collections#method-sum

You can sum the members of the carts collection;

'weight'=> $carts->sum('weight'),

@Snapey Thank you. When I take your suggestion and amplify it with $carts->sum('weight') * $carts->sum('qty'), I get the correct weight.

@newlaravelcoder You should mark the answer by @snapey as best, as it answers the original question

@newlaravelcoder This is not correct solution.

You need to add all of quantity * weight for each item in the cart not total weight * total items

So you will probably need to iterate over the cart items getting the total weight for each

eg, you could have

• 5 items at 1 kilo
• 2 items at 6 kilos

Your calculation for weight will give 7 * 7 kilos = 49 when actually the weight is 5 + 12 = 17 kilos

'weight' = $carts->reduce(function ($carry, $item) {
        return $carry + $item->qty * $item->weight;
    }),

https://laravel.com/docs/8.x/collections#method-reduce

@Snapey Thank you for that important correction.