Eloquent recursive relation - php

Question

I have an issue where I'm trying to get all descendants of an object and keep only those with a specific property.
I have these relations:
public function getChildren()
{
return $this->hasMany(self::class, 'parent_id', 'id');
}
public function allChildren()
{
return $this->getChildren()->with('allChildren');
}
And I get this type of array for example:
$array = [
0 => ['name' => 'aaa', 'type' => 0, 'parent' => null, 'children' => [
1 => ['name' => 'bbb', 'type' => 1, 'parent' => null, 'children' => []],
2 => ['name' => 'ccc', 'type' => 0, 'parent' => null, 'children' => [
3 => ['name' => 'ddd', 'type' => 1, 'parent' => 2, 'children' => []]
]]
]],
4 => ['name' => 'eee', 'type' => 0, 'parent' => null, 'children' => []]
];
For this example, I would like to remove all objects that are of type 1 and get a clean array without those only.
I don't really understand why it is possible to get all descendats of an object but not be able to pass conditions.
Thanks in advance.

Answer 1

A collection only solution would be something like this (place the custom macro in a Service Provider of your application):
Collection::macro('whereDeep', function ($column, $operator, $value, $nested) {
return $this->where($column, $operator, $value)->map(function ($x) use ($column, $operator, $value, $nested) {
return $x->put($nested, $x->get($nested)->whereDeep($column, $operator, $value, $nested));
});
});
Then where needed call:
$yourArray->whereDeep('type', '!=', 1, 'children');
On your example, the macro works like this:
Filter all the elements where: type != 1
(the outer array will beuntouched as both items has type => 0)
For each element of the current array:
Retrive the children property and apply the same filtering to this subarray starting with the first point of this instructions.
Replace the children property with the new children property just filtered.
Anyways, you should try to deep dive into why the relation filtering doesn't work. That solution would be more efficient if optimized correctly.

Answer 2

I found a great solution where there is no need of all this recursion or any of these relationship calls so I share it:
Using: "gazsp/baum"
// get your object with roots method
$contents = Content::roots()->get();
// and simply run through the object and get whatever you need
// thanks to getDescendantsAndSelf method
$myArray = [];
foreach($contents as $content) {
$myArray[] = $content->getDescendantsAndSelf()->where('type', '!=', 1)->toHierarchy();
}
return $myArray;
This works for me the same way as the other method above.