values are not being stored correctly in the array $items - laravel

Question

I want to get the quantity of each registration type with the code below:
$registrationTypeDetails = Registration::with('participants:id,registration_type_id,registration_id')->find($regID);
$type_counts = [];
foreach ($registrationTypeDetails->participants as $p) {
$name = $p->registration_type->name;
if (!isset($type_counts[$name])) {
$type_counts[$name] = 0;
}
$type_counts[$name]++;
}
The dd($type_counts), if the conference has 2 registration types available (general and plus) and the user is doing a registration with 2 participants in the registration type "general" and 0 participants in the registration type "plus" shows:
array:2 [▼
"general" => 2
]
Then I need to make a post request to an API where is necessary to send in the request body the quantity of each registration type, in this case there is only 1 registration type "general" and the value for quantity should be "2".
So I have this code below the above code to create the array:
foreach ($registrationTypeDetails->participants as $registrationType) {
$items['invoice']['items'][] = [
'name' => $registrationType->registration_type->name,
'unit_price' => $registrationType->registration_type->price,
'quantity' => $type_counts[$registrationType->registration_type->name],
];
}
$create = $client->request('POST', 'https://...', [
'query' => ['api_key' => '...'], 'json' => $items,
]);
But then the output array is:
array:1 [▼
"invoice" => array:4 [▼
"client" => array:7 [▶]
"items" => array:2 [▼
0 => array:5 [▼
"name" => "general"
"unit_price" => 10
"quantity" => 2
]
1 => array:5 [▼
"name" => "general"
"unit_price" => 10
"quantity" => 2
]
]
]
]
Instead of only 1 item:
array:1 [▼
"invoice" => array:4 [▼
"client" => array:7 [▶]
"items" => array:2 [▼
0 => array:5 [▼
"name" => "general"
"unit_price" => 10
"quantity" => 2
]
]
]
]
$items shows:
array:1 [▼
"invoice" => array:4 [▼
"items" => array:2 [▼
1 => array:5 [▼
"name" => "general"
"unit_price" => 10
"quantity" => 2
]
2 => array:5 [▼
"name" => "plus"
"unit_price" => 0
"quantity" => 2
]
]
]
]

Answer 1

You would need to key the results of the items according to the registration type name:
foreach ($registrationTypeDetails->participants as $registrationType) {
$items['invoice']['items'][$registrationType->registration_type->name] = [
'name' => $registrationType->registration_type->name,
'unit_price' => $registrationType->registration_type->price,
'quantity' => $type_counts[$registrationType->registration_type->name],
];
}
Better is to use the id of the registration_type if there is one:
foreach ($registrationTypeDetails->participants as $registrationType) {
$items['invoice']['items'][$registrationType->registration_type->id] = [
'name' => $registrationType->registration_type->name,
'unit_price' => $registrationType->registration_type->price,
'quantity' => $type_counts[$registrationType->registration_type->name],
];
}
Explanation
As you loop over the participants linked to a registration type multiple participants could have the same registration type. So in your case you need to group the results according to registration type. Just adding to items[] appends to the items array. You want to group the results by registration type.
Fixing the 422 validation error
Your items is a valid array, but because it is translated to json the 1 and 1 would be keyed as an object. To force the key adjustment you can do the following:
// It is hacky but it re-keys the items array numerically.
$items['invoice']['items'] = array_values($list['invoice']['items']);