Group by an item in a nested array using laravel collection - php

Question

I have an array that has the variable name $array and it is as follows:
$array = [
"data"=> [
[
"company"=>[
"id"=> 1,
"name"=> "company1"
],
"reports"=> [
"active_reports"=> 3,
"completed_reports"=> 2
]
],
[
"company"=>[
"id"=> 2,
"name"=> "company2"
],
"reports"=> [
"active_reports"=> 6,
"completed_reports"=> 1
]
],
[
"company"=>[
"id"=> 2,
"name"=> "company2"
],
"reports"=> [
"active_reports"=> 7,
"completed_reports"=> 5
]
]
]
];
So, I want to group this array by the company id. The id can be found in the nested array with key company
My expected result is below:
{
"1": [
{
"company": {
"id": 1,
"name": "company1"
},
"reports": {
"active_reports": 3,
"completed_reports": 2
}
}
],
"2": [
{
"company": {
"id": 2,
"name": "company2"
},
"reports": {
"active_reports": 6,
"completed_reports": 1
}
},
{
"company": {
"id": 2,
"name": "company2"
},
"reports": {
"active_reports": 7,
"completed_reports": 5
}
}
]
}
So, I tried the following logic:
foreach ($array['data'] as $data) {
$reportsData = collect($data)->groupBy($data['company']['id']);
Log::info($reportsData);
}
But this is the result I'm getting after trying the above logic:
[
{
"": [
{
"id": 1,
"name": "company1"
},
{
"active_reports": 3,
"completed_reports": 2
}
]
},
{
"": [
{
"id": 2,
"name": "company2"
},
{
"active_reports": 6,
"completed_reports": 1
}
]
},
{
"": [
{
"id": 2,
"name": "company2"
},
{
"active_reports": 7,
"completed_reports": 5
}
]
}
]
I want to be able to get the expected result as illustrated above.

Answer 1

You are passing a value to groupBy currently not a 'column' to group by. Though you have nested data here so you will need to pass a callback to groupBy where you will return what value the entities should be grouped by:
collect($array['data'])
->groupBy(fn ($item) => $item['company']['id']);
Or simply using the 'dot' notation (as mentioned by Donkarnash), since we are starting the collection at the 'data' key:
collect($array['data'])->groupBy('company.id');
Laravel 9.x Docs - Collections - Available Methods - groupBy