增加问诊人判断

app/Api/Controllers/PrescriptionController.php

@@ -131,6 +131,9 @@ public function create(Request $request)
         $prescription->user_id = $authInfo->id; // 获取当前用户ID
         // 问诊人信息
         $patient = PatientModel::find($patient_id);
+        if (! $patient) {
+            return $this->failed('问诊人不存在,请选择正确的问诊人');
+        }
         $prescription->patient_id = $patient_id; // 问诊人编号
         $prescription->patient_name = $patient->name; // 问诊人姓名
         $prescription->patient_age = getAgeByIdCard($patient->id_card); // 问诊人年龄