From 0b159891df20f0ef58cef05293b02d42f221a0b2 Mon Sep 17 00:00:00 2001
From: guojunyun <tingyu130@aliyun.com>
Date: Wed, 22 Oct 2025 10:01:50 +0800
Subject: [PATCH] =?UTF-8?q?=E6=A0=B9=E6=8D=AE=E5=90=88=E5=90=8CID=E8=8E=B7?=
 =?UTF-8?q?=E5=BE=97=E5=85=B3=E8=81=94=E5=90=88=E5=90=8C?=
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---
 .../contract/vo/contract/RelationRespVO.java  | 15 +++++++++++
 .../service/contract/ContractService.java     |  8 ++++++
 .../service/contract/ContractServiceImpl.java | 26 +++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/controller/admin/contract/vo/contract/RelationRespVO.java

diff --git a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/controller/admin/contract/vo/contract/RelationRespVO.java b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/controller/admin/contract/vo/contract/RelationRespVO.java
new file mode 100644
index 0000000..9e87427
--- /dev/null
+++ b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/controller/admin/contract/vo/contract/RelationRespVO.java
@@ -0,0 +1,15 @@
+package com.zt.plat.module.contractorder.controller.admin.contract.vo.contract;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Data;
+
+@Schema(description = "管理后台 - 合同关联 Response VO")
+@Data
+public class RelationRespVO {
+
+    @Schema(description = "上游主键")
+    private Long upId;
+
+    @Schema(description = "下游主键")
+    private Long downId;
+}
diff --git a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractService.java b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractService.java
index e758493..7a3b35c 100644
--- a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractService.java
+++ b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractService.java
@@ -163,6 +163,14 @@ public interface ContractService {
      */
     Boolean relation(RelationReqVo reqVo);
 
+    /**
+     * 根据合同ID获得关联合同
+     *
+     * @param id 上合同ID
+     * @return 上下游合同ID
+     */
+    RelationRespVO getRelation(Long id);
+
     /**
      * 下载文件
      *
diff --git a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java
index 91f33c9..765a864 100644
--- a/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java
+++ b/zt-module-contract-order/zt-module-contract-order-server/src/main/java/com/zt/plat/module/contractorder/service/contract/ContractServiceImpl.java
@@ -1386,6 +1386,32 @@ public class ContractServiceImpl implements ContractService {
         return insert > 0;
     }
 
+    @Override
+    public RelationRespVO getRelation(Long id) {
+
+        // 返回结果
+        RelationRespVO resp = new RelationRespVO();
+
+        // 获得上游合同关联
+        SystemRelativityDO upSystemRelativityDO = systemRelativityMapper
+                .selectOne(new LambdaQueryWrapperX<SystemRelativityDO>()
+                        .eq(SystemRelativityDO::getDownId, id)
+                );
+
+        // 获得下游合同关联
+        SystemRelativityDO downSystemRelativityDO = systemRelativityMapper
+                .selectOne(new LambdaQueryWrapperX<SystemRelativityDO>()
+                        .eq(SystemRelativityDO::getUpId, id)
+                );
+
+        // 上游合同ID
+        if (upSystemRelativityDO != null) resp.setUpId(upSystemRelativityDO.getId());
+        // 下游合同ID
+        if (downSystemRelativityDO != null) resp.setDownId(downSystemRelativityDO.getId());
+
+        return resp;
+    }
+
     @Override
     public ResponseEntity<ByteArrayResource> download(List<Long> ids) {
         try {