Merge items in laravel collections with same id and sum other columns - laravel

Question

I have a collection like this:
I want to merge or unifi the "rows" that have the same "referencia" and sum the last columns if exists...(t1_total,t2_total,t3_total...)
foreach ($compo_escandallo as $row) {
$scandal->subtotal = $scandal->subtotal + $row->importe;
if ($row->um == "M") { /**&& $row->merma != 0 */
($row->merma) / 100;
} else {
$row->merma;
}
if ($row->tipo == "MMPP") {
$total_mmpp = $total_mmpp + $row->importe;
}
if ($row->xtalla == "X") {
//$consumo = 0;
foreach ($tallas as $talla){
if($talla->tallan=="001" or $talla->tallan=="075" or $talla->tallan=="S"){
$row->t1_total = ($this->floatvalue($row->t1) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="002" or $talla->tallan=="080" or $talla->tallan=="M"){
$row->t2_total = ($this->floatvalue($row->t2) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="003" or $talla->tallan=="085" or $talla->tallan=="L"){
$row->t3_total = ($this->floatvalue($row->t3) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="004" or $talla->tallan=="090" or $talla->tallan=="XL"){
$row->t4_total = ($this->floatvalue($row->t4) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="005" or $talla->tallan=="095" or $talla->tallan=="XXL"){
$row->t5_total = ($this->floatvalue($row->t5) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="006" or $talla->tallan=="100"){
$row->t6_total = ($this->floatvalue($row->t6) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="007" or $talla->tallan=="105"){
$row->t7_total = ($this->floatvalue($row->t7) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="008" or $talla->tallan=="110"){
$row->t8_total = ($this->floatvalue($row->t8) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="009" or $talla->tallan=="115"){
$row->t9_total = ($this->floatvalue($row->t9) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="010" or $talla->tallan=="120"){
$row->t10_total = ($this->floatvalue($row->t10) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}elseif($talla->tallan=="011" or $talla->tallan=="125"){
$row->t11_total = ($this->floatvalue($row->t11) + ($this->floatvalue($row->merma)/100)) * $this->floatvalue($row->veces);
}
}
}
}
$filtered_collection = $compo_escandallo->filter(function ($item) {
return $item->xtalla == 'X';
})->values();
Not in all cases have 11 totals, sometimes have 3 or 4 totals only, as see in picture. How can i do this? I try some examples in stackoverflow as:
`$unique = $compo_escandallo->unique('referencia');
$unique->transform(function ($item, $key) use ($compo_escandallo) {
//dd($item->referencia);
$id = $item->referencia;
$item->referencia = $compo_escandallo->sum(function ($product) use ($id) {
dd($product);
if($product->referencia == $id){
return $product->t1_total;
}
});
return $item;
});
return $unique->all();`
But not work as i expect and no return the collection as i need.
Thank you in advance for any help.

Answer 1

You can use groupBy method of the collection and then map the totals something like :-
use Illuminate\Support\Collection;
// $data = your fetched item from the db
$collected_data = new Collection($data)->groupBy('referencia');
// now that you have the data sorted according the ref, sum their totals
$collected_data = $collected_data->eachSpread(function ($item, $key) {
return $item['grand_total', $item->sum('t1_total', 't3_total')];
});
hope that helps, tweak the variables and the nesting of the code to your specific need.