单个药品排他

app/Api/Controllers/DrugController.php

@@ -172,7 +172,9 @@ public function drugLimit(Request $request)
 
                 return $this->failed($errMsg, ['add_status' => false]);
             }
+            if ($drugModel->excluded_drug_ids) {
                 $exclusions[$drug['drug_id']] = $drugModel->excluded_drug_ids;
+            }
             $drug['drug_name'] = $drugModel->name; // 冗余药品名称
             $drug['mahuangsu_status'] = 0; // 0：不是麻黄素药品
             $drug['limit_num'] = $limit_num; // 赋值全局限购数量