Laravel dynamic whereHas - php

Question

I am trying to run a query through a relationship path. In human readable format:
Get collection of orders where $order->orderItem->product->sku is LIKE 'red-jumper';
I can create this manually using a whereHas query as follows:
$query->whereHas('orderItems', function($query) use($request){
$query->whereHas('product', function ($query) use($request){
$query->where('sku', 'LIKE', '%' . $request->search . '%');
});
});
However, if I want this to be dynamic and do not know the amount of levels in the relationships, how can I do this?
I would be looking for something lik:
$paths = [
0 => 'orderItems'
1 => 'product,
2 => 'sku'
];
$query->whereHas($paths[0], function($query) use($request, $paths){
$query->whereHas($paths[1], function ($query) use($request, $paths){
$query->whereHas($paths[2], function ($query) use($request, $paths) {
$query->whereHas($paths[3], function ($query) use ($request, $paths) {
$query->where('sku', 'LIKE', '%' . $request->search . '%');
});
});
});
});
Maybe there is a better way to do this all together?

Answer 1

There is a slightly better way in my opinion. You can use dot (.) notation for relationships and collections to turn your $path array into what you want. First we reduce the $path to a dotted relationship and separate the attribute you want to filter by later
$path = ['orderItems', 'product', 'sku']
$param = array_pop($path)
// $path = ['orderItems', 'product']
// $param = 'sku'
$dotPath = collect($path)->reduce(function ($c, $i) {
return $c . $i . '.';
});
// $dotPath = 'orderItems.product.'
$dotPath = substr($dotPath, 0, -1)
// $dotPath = 'orderItems.product'
And then we check with whereHas
$query->whereHas($dotPath, function ($query) use ($request, $param){
$query->where($param, 'LIKE', '%' . $request->search . '%');
})->get();