|string> */ public function rules(): array { return [ 'spare_part_id' => 'required|exists:spare_parts,id', 'source_text' => 'nullable|string|max:255', 'sourceable_id' => 'nullable|integer', 'sourceable_type' => 'nullable|string', 'status' => 'required|in:ordered,in_stock,shipped', 'ordered_quantity' => 'required|integer|min:1', 'with_documents' => 'boolean', 'note' => 'nullable|string', ]; } }