Merge a Laravel array of Collections, and add new properties/attributes [closed] - php

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I have a collection array of 'Products', as seen from the dump below.
Illuminate\Support\Collection {#918 ▼
#items: array:12 [▼
0 => App\Product {#934 ▶}
1 => App\Product {#943 ▶}
2 => App\Product {#959 ▶}
3 => App\Product {#968 ▶}
4 => App\Product {#984 ▶}
5 => App\Product {#993 ▶}
6 => App\Product {#1009 ▶}
7 => App\Product {#1018 ▶}
8 => App\Product {#1034 ▶}
9 => App\Product {#1043 ▶}
10 => App\Product {#1059 ▶}
11 => App\Product {#1068 ▶}
]
}
This array has ONLY two unique products;
App\Product {#934 ▼
...
+wasRecentlyCreated: false
#attributes: array:10 [▼
"id" => 1
"slug" => "26027686555545"
"details" => App\DispatchStock {#900 ▼
...
#attributes: array:9 [▼
...
"quantity" => 3
"created_at" => "2020-05-04 15:56:07"
]
...
}
]
...
}
and
App\Product {#943 ▼
...
+wasRecentlyCreated: false
#attributes: array:10 [▼
"id" => 2
"slug" => "26027687444410"
"details" => App\DispatchStock {#899 ▼
...
#attributes: array:9 [▼
...
"quantity" => 5
"created_at" => "2020-05-04 15:56:07"
]
...
}
]
...
}
duplicated 6 times each (with varying 'quantity's).
I want to loop through the collection array of 'Products', merge all the duplicates, and return an array of just the unique products.And have something like:
Illuminate\Support\Collection {#918 ▼
#items: array:2 [▼
0 => App\Product {#934 ▶}
1 => App\Product {#943 ▶}
]
}
While appending a new attribute 'combined_available_quantity' (the sum of all the 'quantity's of the Products) to the 'details' property of each of the unique Products.
For example, I want one of the final 'Product's to look like:
App\Product {#943 ▼
...
+wasRecentlyCreated: false
#attributes: array:10 [▼
"id" => 2
"slug" => "26027687444410"
"details" => App\DispatchStock {#899 ▼
...
#attributes: array:9 [▼
...
"quantity" => 5
"created_at" => "2020-05-04 15:56:07"
"combined_available_quantity" => 27
]
...
}
]
...
}
I already started with the code below.
...
$combinedProducts = collect();
foreach ($products as $product) {
$combinedProducts = $combinedProducts->each(function($combinedProduct) use ($combinedProducts, $product) {
if ($combinedProduct->slug == $product->slug) {
$qty = $product->details->quantity + $combinedProduct->details->quantity;
$combinedProduct->details->setAttribute('combined_available_quantity', $qty);
} else {
$product->details->setAttribute('combined_available_quantity', $product->details->quantity);
$combinedProducts->push($product);
}
});
$combinedProducts = $combinedProducts->values();
}
But it's buggy, and doesn't give me required results.
I need a better approach. Thanks.

Answer 1

$collect->groupBy('slug')->map(function($item){
return $item->sum('quantity');
})