Laravel Collection does n't work correctly - php

Question

I have a problem with my collection
$tasks = Bear::all();
$val = new Collection([]);
foreach($tasks as $tas){
$val ->push($tas->id);
}
$tasks1 = BearPic::whereIn('bear_id',$val)->get();
$val2 = new Collection([]);
foreach($tasks1 as $tas){
$val ->push($tas->bear_id);
}
my echo on val one is
[10,11,12,10,10,11,11,12,12]
And on tasks1 is
[{
"id": 1,
"bear_id": 10,
"picnic_id": 1,
"created_at": null,
"updated_at": null
}, {
"id": 2,
"bear_id": 10,
"picnic_id": 2,
"created_at": null,
"updated_at": null
}, {
"id": 3,
"bear_id": 11,
"picnic_id": 1,
"created_at": null,
"updated_at": null
}, {
"id": 4,
"bear_id": 11,
"picnic_id": 2,
"created_at": null,
"updated_at": null
}, {
"id": 5,
"bear_id": 12,
"picnic_id": 1,
"created_at": null,
"updated_at": null
}, {
"id": 6,
"bear_id": 12,
"picnic_id": 2,
"created_at": null,
"updated_at": null
}]
the second collection returns empty
what might be the problem? I am rather new to laravel this is a tutorial

Answer 1

The second collection val2 is empty simply because you are pushing the values to val i.e. the first collection instead of val2.
Also, if you insist on not using joins and working on Collections, pluck is indeed a quicker solution.
$tasks = Bear::all();
$val = $tasks->pluck('id');
$tasks1 = BearPic::whereIn('bear_id', $val)->get();
$val2 = $tasks2->pluck('bear_id');

Answer 2

If I understand correctly, you wanted to put all of id values of $tasks1 collection to $val2, am I correct? If so then you could simply do like this:
$tasks1 = BearPic::whereIn('bear_id',$val)->get();
$val2 = $tasks1->pluck('id');