|string> */ public function rules(): array { return [ 'fournisseur_id' => ['nullable', 'exists:fournisseurs,id'], 'po_number' => ['nullable', 'string', 'max:191', 'unique:purchase_orders,po_number,' . $this->route('purchase_order')], 'status' => ['nullable', 'in:brouillon,confirmee,livree,facturee,annulee'], 'order_date' => ['nullable', 'date'], 'expected_date' => ['nullable', 'date'], 'currency' => ['nullable', 'string', 'size:3'], 'total_ht' => ['nullable', 'numeric', 'min:0'], 'total_tva' => ['nullable', 'numeric', 'min:0'], 'total_ttc' => ['nullable', 'numeric', 'min:0'], 'notes' => ['nullable', 'string'], 'delivery_address' => ['nullable', 'string'], 'lines' => ['nullable', 'array', 'min:1'], 'lines.*.product_id' => ['nullable', 'exists:products,id'], 'lines.*.description' => ['required', 'string'], 'lines.*.quantity' => ['required', 'numeric', 'min:0.001'], 'lines.*.unit_price' => ['required', 'numeric', 'min:0'], 'lines.*.tva_rate' => ['required', 'numeric', 'min:0'], 'lines.*.discount_pct' => ['nullable', 'numeric', 'min:0', 'max:100'], 'lines.*.total_ht' => ['required', 'numeric', 'min:0'], ]; } }