Nesting repeaters for BelongsToMany relationships

[marc31]

Package

filament/filament

Package Version

v3.2

Laravel Version

v11.9

Livewire Version

v3.5

PHP Version

PHP 8.3

Problem description

Following the example of using a repeater to fill BelongsToMany relationships [https://filamentphp.com/docs/3.x/forms/fields/repeater], I want to nest two repeaters with BelongsToMany relationships to handle a scenario like this:

I have Orders that have Products, which in turn have Colors.

I'm encountering a bug during the initial save: the color is not saved correctly because the order_product_id column in the color_order_product table is null. However, if I add new colors to a product in the order afterward, the modification is saved correctly.

But if I add a new product, the same issue arises.

Repeater::make('order_product')
    ->relationship('orderProducts')
    ->schema([
        Select::make('product_id')
            ->relationship('product', 'title')
            ->required()
            ->live(),
        Repeater::make('colorOrderProducts')
            ->relationship('colorOrderProducts')
            ->schema([
                Select::make('color_id')
                    ->options(
                        function ($get) {
                            $selectedProduct = Product::find($get('../../product_id'));
                            if ($selectedProduct) {
                                return $selectedProduct->colors()->get()->pluck('title', 'id');
                            }
                        }
                    )
                    ->required(),
            ])
    ])

Expected behavior

When creating an order, adding products, and assigning colors to those products using the nested repeater, all entries should be saved correctly.

Steps to reproduce

1. Create an order with products and assign colors to those products using the nested repeater.

2. Save the order.

3. Check the color_order_product table and observe that the order_product_id column is null for the initially added colors.

4. Add new colors to the existing product and save again. Observe that these new colors are saved correctly.

5. Add a new product to the order and assign colors. Save and observe the issue reoccurs.

Reproduction repository

https://github.com/marc31/filament-nested-repeater-w-relationship

Relevant log output

No response

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