Level 14
You should be able to use the collection flatten and pluck method to achieve this:
- https://laravel.com/docs/5.8/collections#method-pluck
- https://laravel.com/docs/5.8/collections#method-flatten
$ids = $collection->flatten()->pluck('id');
Oct 24, 2019
5
Level 8
How to flat multidimensional array of objects ?
Hello ,
I have this multidimensional collection bellow and I would like to get all id values to have at the end an array like [7,201,66,17,15,93,88,4,502]
Thanks
[
{
"id": 7,
"name": "Alvah Harris",
"team_leader_of_with_descendants": [
]
},
{
"id": 201,
"name": "Prof. Walker Cronin",
"team_leader_of_with_descendants": [
{
"id": 66,
"team_leader_of_with_descendants": [
]
},
{
"id": 17,
"name": "Dr. Hosea Lueilwitz IV",
"team_leader_of_with_descendants": [
{
"id": 15,
"avatar": "1566561953_5d5fd6a1ac6b2.png",
"team_leader_of_with_descendants": [
]
},
{
"id": 93,
"name": "Edyth Frami Sr.",
"team_leader_of_with_descendants": [
]
}
]
}
]
},
{
"id": 88,
"name": "Guadalupe Simonis Jr.",
"avatar": "user.jpg",
"team_leader_of_with_descendants": [
]
},
{
"id": 4,
"name": "Axel Windler",
"avatar": "user.jpg",
"team_leader_of_with_descendants": [
{
"id": 502,
"name": "Mostafa Abdellaoui",
"team_leader_of_with_descendants": [
]
}
]
}
]
Level 8
@mstrauss this works only with the first level and it returns :
[
7,
201,
88,
4
]
Level 14
That makes sense, since flatten would remove the keys from the ids and hence, pluck will not pick up on them. Try just using the pluck method to see what that returns:
$ids = $collection->pluck('id');
Level 8
@mstrauss unfortunatelyI got the same result :
[
7,
201,
88,
4
]
Level 102
I personally had a similar issue not long ago and I ended up creating these two collection helpers to make it work. You can change them to fit your data and add them to a service provider. Be aware that is expects that children are relations (I expect they are in your case as well)
Collection::macro('flattenTree', function() {
$items = [];
foreach ($this->items as $node) {
$items = array_merge($items, $this->flattenNode($node));
}
return new static($items);
});
Collection::macro('flattenNode', function($node) {
$items = [];
$items[] = $node;
foreach ($node->children as $childNode) {
$items = array_merge($items, $this->flattenNode($childNode));
}
$node->unsetRelation('children');
return $items;
});
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