商家认证查询优化

vehicle-server/src/main/java/com/chelvc/cloud/vehicle/server/service/impl/MerchantAuthServiceImpl.java

@@ -64,6 +64,9 @@ public class MerchantAuthServiceImpl extends ServiceImpl<MerchantAuthMapper, Mer
         MerchantAuth merchantAuth = this.lambdaQuery()
                 .eq(MerchantAuth::getApplicant, userId).one();
         MerchantAuthDTO merchantAuthDTO = MerchantAuthCopier.INSTANCE.copying(merchantAuth);
+        if (merchantAuthDTO == null){
+            return null;
+        }
         merchantAuthDTO.setMerchant(this.merchantService.getMerchantByUserId(userId));
         return merchantAuthDTO;
     }