review: 流程发起时，只预测类型为发起人自选的节点信息

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/candidate/strategy/dept/BpmTaskCandidateApproveUserSelectStrategy.java

@@ -65,9 +65,8 @@ public class BpmTaskCandidateApproveUserSelectStrategy extends AbstractBpmTaskCa
         if (processVariables == null) {
             return Sets.newLinkedHashSet();
         }
+        // 流程预测时会使用，允许审批人为空，如果为空前端会弹出提示选择下一个节点审批人，避免流程无法进行，审批时会真正校验节点是否配置审批人
         Map<String, List<Long>> approveUserSelectAssignees = FlowableUtils.getApproveUserSelectAssignees(processVariables);
-        Assert.notNull(approveUserSelectAssignees, "流程实例节点({}) 的下一个执行节点审批人不能为空",
-                activityId);
         if (approveUserSelectAssignees == null) {
             return Sets.newLinkedHashSet();
         }

yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmProcessInstanceServiceImpl.java

@@ -224,6 +224,10 @@ public class BpmProcessInstanceServiceImpl implements BpmProcessInstanceService
         List<ActivityNode> simulateActivityNodes = getSimulateApproveNodeList(startUserId, bpmnModel,
                 processDefinitionInfo,
                 processVariables, activities);
+        // 3.3 如果时发起动作,activityId为开始节点，不校验审批人自选节点
+        if (ObjUtil.isNotNull(reqVO.getActivityId()) && ObjUtil.equals(reqVO.getActivityId(),BpmnModelConstants.START_USER_NODE_ID)){
+            simulateActivityNodes.removeIf(node -> BpmTaskCandidateStrategyEnum.APPROVE_USER_SELECT.getStrategy().equals(node.getCandidateStrategy()));
+        }
 
         // 4. 拼接最终数据
         return buildApprovalDetail(reqVO, bpmnModel, processDefinition, processDefinitionInfo, historicProcessInstance,