fix(oa/erp):修复项目计划查询和保存逻辑

- 添加空值检查避免空指针异常
- 优化项目计划阶段列表的插入逻辑- 使用ObjectUtils工具类进行对象判空- 调整条件判断顺序提高代码可读性

ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/service/impl/ErpProjectPlanServiceImpl.java

@@ -9,6 +9,7 @@ import org.dromara.common.core.enums.BusinessStatusEnum;
 import org.dromara.common.core.enums.OAStatusEnum;
 import org.dromara.common.core.exception.ServiceException;
 import org.dromara.common.core.utils.MapstructUtils;
+import org.dromara.common.core.utils.ObjectUtils;
 import org.dromara.common.core.utils.StringUtils;
 import org.dromara.common.mybatis.core.page.TableDataInfo;
 import org.dromara.common.mybatis.core.page.PageQuery;
@@ -66,6 +67,9 @@ public class ErpProjectPlanServiceImpl implements IErpProjectPlanService {
     public ErpProjectPlanVo queryById(Long projectPlanId){
         // 使用自定义方法查询，包含关联数据
         ErpProjectPlanVo projectPlanVo = baseMapper.selectCustomErpProjectPlanVoById(projectPlanId);
+        if (ObjectUtils.isEmpty(projectPlanVo)) {
+            return null;
+        }
         // 查询项目计划阶段列表
         MPJLambdaWrapper<ErpProjectPlanStage> lqw = JoinWrappers.lambda(ErpProjectPlanStage.class)
             .selectAll(ErpProjectPlanStage.class)
@@ -139,12 +143,14 @@ public class ErpProjectPlanServiceImpl implements IErpProjectPlanService {
         validateProjectManager(bo.getManagerId());
         List<ErpProjectPlanStage> planStageList = bo.getPlanStageList();
         boolean flag = baseMapper.insert(add) > 0;
-        if (flag && planStageList != null && !planStageList.isEmpty()) {
+        if (flag) {
             bo.setProjectPlanId(add.getProjectPlanId());
-            for (ErpProjectPlanStage planStage : planStageList) {
-                planStage.setProjectPlanId(add.getProjectPlanId());
-                planStage.setProjectId(add.getProjectId());
-                planStageMapper.insert(planStage);
+            if ( ObjectUtils.isNotEmpty(planStageList)) {
+                for (ErpProjectPlanStage planStage : planStageList) {
+                    planStage.setProjectPlanId(add.getProjectPlanId());
+                    planStage.setProjectId(add.getProjectId());
+                    planStageMapper.insert(planStage);
+                }
             }
         }
         return flag;