优化兼容

app/Http/Services/SkuService.php

@@ -87,6 +87,9 @@ class SkuService
                 if (!empty($sku['ladder_price'])) {
                     $priceService = new PriceService();
                     $moqPrice = $priceService->getMoqPrice($sku['ladder_price']);
+                    if (!is_array($sku['ladder_price'])) {
+                        $sku['ladder_price'] = json_decode($sku['ladder_price'], true);
+                    }
                     foreach ($sku['ladder_price'] as &$ladder) {
                         $ladder['purchases'] = $ladder['purchases'] == 0 ? $sku['moq'] : $ladder['purchases'];
                     }