|string> */ public function rules(): array { return [ 'quote_id' => 'required|exists:quotes,id', 'product_id' => 'nullable|exists:products,id', 'packaging_id' => 'nullable|exists:product_packagings,id', 'packages_qty' => 'nullable|numeric|min:0', 'units_qty' => 'nullable|numeric|min:0', 'description' => 'required|string', 'qty_base' => 'nullable|numeric|min:0', 'unit_price' => 'required|numeric|min:0', 'unit_price_per_package' => 'nullable|numeric|min:0', 'tva_rate_id' => 'nullable|exists:tva_rates,id', 'discount_pct' => 'required|numeric|min:0|max:100', 'total_ht' => 'required|numeric|min:0', ]; } }