Laravel groupBy on relationship without array_merge - php

Question

I'm building a Laravel 9 project. I've created a Product model and ProductOption model. My options need to be grouped by a column called region_code (which isn't always set) so that the options for the product can easily be shown. I realise that if I run $product->options->groupBy('region_code') it will give me the desired result, but I need these grouped options to be part of the Product model, thus I'm doing an array_merge.
This approach works, but I feel that it's a bit messy having to convert it to an array and merging the results back into one.
I did try doing a groupBy('region_code') in my with clause, but this didn't give me anything.
Here's my current code and output
$selectedProduct = $request->input('product');
$selectedType = $request->input('type');
$product = Product::where('slug', $selectedProduct)
->where('is_enabled', true)
->with(['options' => function ($query) use ($selectedType) {
$query->where('is_enabled', true)
->whereNotNull('region_code')
->where('slug', 'like', "%$selectedType%");
}])->first();
if (! $product) {
return response()->json([
'message' => "No product found."
], 404);
}
$product = array_merge($product->toArray(), [
'options' => $product->options->groupBy('region_code')->toArray()
]);
return response()->json([
'product' => $product
], 200);
A cleaner approach I thought I could override the options key, and do this:
$options = $product->options->groupBy('region_code');
$product->options = $options;
return response()->json([
'product' => $product
], 200);
But this then looses the grouping entirely.
How could I clean this up?
UPDATE
Below is my table schema for each model:
Product
Schema::create('products', function (Blueprint $table) {
$table->uuid('id')->primary();
$table->string('title');
$table->string('slug')->unique();
$table->string('description')->nullable();
$table->json('extra')->nullable();
$table->boolean('is_enabled')->default(1)->index();
$table->timestamps();
$table->softDeletes();
});
ProductOption
Schema::create('product_options', function (Blueprint $table) {
$table->uuid('id')->primary();
$table->foreignUuid('product_id');
$table->string('title');
$table->string('slug')->unique();
$table->string('description')->nullable();
$table->string('region_code')->nullable()->index();
$table->json('extra')->nullable();
$table->string('stripe_id')->unique();
$table->integer('quantity')->default(1);
$table->boolean('is_enabled')->default(1)->index();
$table->timestamps();
$table->softDeletes();
});

Answer 1

$selectedProduct = $request->input('product');
$selectedType = $request->input('type');
$product = Product::where('slug', $selectedProduct)
->where('is_enabled', true)
->with(['options' => function ($query) use ($selectedType) {
$query->where('is_enabled', true)
->whereNotNull('region_code')
->where('slug', 'like', "%$selectedType%")
//just add here
->groupBy('region_code');
}])->first();
if (!$product) {
return response()->json([
'message' => "No product found."
], 404);
}
return response()->json([
'product' => $product
], 200);