How to replace specific item in a collection of items in Laravel - laravel

Question

I have a bit of a problem in Laravel. I'm using a collection where I add in new users which have been registered to a particular activity. These are formatted in the following way
{
[
"ID" => "1",
"Email" => "test#example.com",
"Registrations" => [
"Sports" => [
[
"id" => "457",
"title" => "Football"
],
[
"id" => "459",
"title" => "Rugby"
]
]
]
],
[
"ID" => "2",
"Email" => "test2#example.com",
"Registrations" => [
"Sports" => [
[
"id" => "457",
"title" => "Football"
],
[
"id" => "458",
"title" => "Badminton"
]
]
]
]
}
The issue I'm having is that when attempting to add a new Sports id I'm not sure how to go about it. The way I originally thought about doing it is checking if that particular email has already been registered and then replacing the data within the collection. However I encountered a problem with each time there was an existing entry the whole data structure would get replaced. Any helpful advice? Below is a reference to what I already have
return $user_courses->where('ContactID' , $user['Registration']['Link']['Contact']['ContactID'])
->map(function($key) use ($user, $sportService){
$course_id = $sportService->validateSport($user['Registration']['Link']['Activity']['ContentUri']);
if($course_id){
$key['Registrations']['Sports'][] = [
'id' => $course_id,
'title' => $user['Registration']['Link']['Activity']['Title']
];
return $key;
}
return $key;
});

Answer 1

first, you can filter that object that you want to replace from the collection and then push the new object to it.
checkout this link