[Fix-16567] Unable to delete copied nodes in unsaved workflow (#16576)

1. Fix the handling logic for when the backend API returns an empty array
2. If the dependent Lineage Task List is empty, no further query is required

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/WorkflowLineageServiceImpl.java

@@ -260,16 +260,19 @@ public class WorkflowLineageServiceImpl extends BaseServiceImpl implements Workf
         if (project == null) {
             throw new ServiceException(Status.PROJECT_NOT_FOUND, projectCode);
         }
+        List<DependentLineageTask> dependentLineageTaskList = new ArrayList<>();
         List<WorkflowTaskLineage> workflowTaskLineageList =
                 workflowTaskLineageDao.queryWorkFlowLineageByDept(projectCode,
                         workflowDefinitionCode, taskCode == null ? 0 : taskCode);
+        if (workflowTaskLineageList.isEmpty()) {
+            return dependentLineageTaskList;
+        }
         List<WorkflowDefinition> workflowDefinitionList =
                 workflowDefinitionMapper.queryByCodes(workflowTaskLineageList.stream()
                         .map(WorkflowTaskLineage::getWorkflowDefinitionCode).distinct().collect(Collectors.toList()));
         List<TaskDefinition> taskDefinitionList = taskDefinitionMapper.queryByCodeList(workflowTaskLineageList.stream()
                 .map(WorkflowTaskLineage::getTaskDefinitionCode).filter(code -> code != 0).distinct()
                 .collect(Collectors.toList()));
-        List<DependentLineageTask> dependentLineageTaskList = new ArrayList<>();
         for (WorkflowTaskLineage workflowTaskLineage : workflowTaskLineageList) {
             DependentLineageTask dependentLineageTask = new DependentLineageTask();
             taskDefinitionList.stream()

dolphinscheduler-ui/src/views/projects/components/dependencies/use-dependencies.ts

@@ -30,14 +30,21 @@ export function useDependencies() {
         workFlowCode: workflowCode,
         taskCode: taskCode
       } as DependentTaskReq
-      const res = await queryDependentTasks(projectCode, dependentTaskReq)
+      await queryDependentTasks(projectCode, dependentTaskReq).then(
-      res
+        (res: any) => {
-        .filter((item: any) => item.workflowDefinitionCode !== workflowCode)
+          if (res?.data?.length > 0) {
-        .forEach((item: any) => {
+            res.data
-          tasks.push(
+              .filter(
-            item.workflowDefinitionName + '->' + item.taskDefinitionName
+                (item: any) => item.workflowDefinitionCode !== workflowCode
-          )
+              )
-        })
+              .forEach((item: any) => {
+                tasks.push(
+                  item.workflowDefinitionName + '->' + item.taskDefinitionName
+                )
+              })
+          }
+        }
+      )
     }
     return tasks
   }
@@ -51,14 +58,21 @@ export function useDependencies() {
       const dependentTaskReq = {
         workFlowCode: workflowCode
       } as DependentTaskReq
-      const res = await queryDependentTasks(projectCode, dependentTaskReq)
+      await queryDependentTasks(projectCode, dependentTaskReq).then(
-      res
+        (res: any) => {
-        .filter((item: any) => item.workflowDefinitionCode !== workflowCode)
+          if (res?.data?.length > 0) {
-        .forEach((item: any) => {
+            res.data
-          tasks.push(
+              .filter(
-            item.workflowDefinitionName + '->' + item.taskDefinitionName
+                (item: any) => item.workflowDefinitionCode !== workflowCode
-          )
+              )
-        })
+              .forEach((item: any) => {
+                tasks.push(
+                  item.workflowDefinitionName + '->' + item.taskDefinitionName
+                )
+              })
+          }
+        }
+      )
     }
     return tasks
   }
@@ -110,25 +124,29 @@ export function useDependencies() {
     if (workflowCode && projectCode) {
       await queryDependentTasks(projectCode, dependentTaskReq).then(
         (res: any) => {
-          res.data
+          if (res?.data?.length > 0) {
-            .filter((item: any) => {
+            res.data
-              if (item.workflowDefinitionCode) {
+              .filter((item: any) => {
-                return item.workflowDefinitionCode !== workflowCode
+                if (item.workflowDefinitionCode) {
-              } else {
+                  return item.workflowDefinitionCode !== workflowCode
-                return false
+                } else {
-              }
+                  return false
-            })
-            .forEach((item: any) => {
-              dependentTaskLinks.push({
-                text:
-                  item.workflowDefinitionName + '->' + item.taskDefinitionName,
-                show: true,
-                action: () => {
-                  const url = `/projects/${item.projectCode}/workflow/definitions/${item.workflowDefinitionCode}`
-                  window.open(url, '_blank')
                 }
               })
-            })
+              .forEach((item: any) => {
+                dependentTaskLinks.push({
+                  text:
+                    item.workflowDefinitionName +
+                    '->' +
+                    item.taskDefinitionName,
+                  show: true,
+                  action: () => {
+                    const url = `/projects/${item.projectCode}/workflow/definitions/${item.workflowDefinitionCode}`
+                    window.open(url, '_blank')
+                  }
+                })
+              })
+          }
         }
       )
     }
@@ -148,19 +166,25 @@ export function useDependencies() {
     if (workflowCode && projectCode) {
       await queryDependentTasks(projectCode, dependentTaskReq).then(
         (res: any) => {
-          res
+          if (res?.data?.length > 0) {
-            .filter((item: any) => item.workflowDefinitionCode !== workflowCode)
+            res.data
-            .forEach((item: any) => {
+              .filter(
-              dependentTaskLinks.push({
+                (item: any) => item.workflowDefinitionCode !== workflowCode
-                text:
+              )
-                  item.workflowDefinitionName + '->' + item.taskDefinitionName,
+              .forEach((item: any) => {
-                show: true,
+                dependentTaskLinks.push({
-                action: () => {
+                  text:
-                  const url = `/projects/${item.projectCode}/workflow/definitions/${item.workflowDefinitionCode}`
+                    item.workflowDefinitionName +
-                  window.open(url, '_blank')
+                    '->' +
-                }
+                    item.taskDefinitionName,
+                  show: true,
+                  action: () => {
+                    const url = `/projects/${item.projectCode}/workflow/definitions/${item.workflowDefinitionCode}`
+                    window.open(url, '_blank')
+                  }
+                })
               })
-            })
+          }
         }
       )
     }