Attempt to read property post_id on int - laravel

Question

I have a small response from db model, and i colud rebase it and response in route, but i see error.
My Controller:
class PostController extends Controller {
public function getLastRecord() {
$lastRec = Post::latest('created_at')->first();
$res = [];
$res = collect($lastRec)->map(function($record) {
return [
'id' => $record->post_id,
'rec_name' => $record->post_name,
'user' => $record->user_id,
];
})->toArray();
return $res;
}
}
I want that response will be array
['id': 1, 'rec_name': 'test_name', 'user': 1]
instead names from db
['post_id': 1, 'post_name': 'test_name', 'user_id': 1]
Error:
Attempt to read property "post_id" on int

Answer 1

When you collect() a single Record, then call ->map() (or other iterative methods), it loops over your Model's columns, not multiple Post records. You can solve this by wrapping $lastRec in an array, or using ->get() instead of ->first():
$lastRec = Post::latest('created_at')->first();
return collect([$lastRec])->map(function($record) {
return [
'id' => $record->post_id,
'rec_name' => $record->post_name,
'user' => $record->user_id,
];
})->toArray();
// OR
$lastRecs = Post::latest('created_at')->get();
return $lastRecs->map(function ($record) {
return [
'id' => $record->post_id,
'rec_name' => $record->post_name,
'user' => $record->user_id,
];
})->toArray();
Or, since this is a single record (using ->first() only ever returns 1 record), you don't need to collect() or map() at all:
$lastRec = Post::latest('created_at')->first();
return [
'id' => $lastRec->post_id,
'rec_name' => $lastRec->post_name,
'user' => $lastRec->user_id
];