fix: child workflow variable default value not init (#6620)

document/content/docs/self-host/upgrading/4-14/41410.mdx

+---
+title: 'V4.14.10(进行中)'
+description: 'FastGPT V4.14.10 更新说明'
+---
+
+
+## 🚀 新增内容
+
+
+## ⚙️ 优化
+
+
+## 🐛 修复
+
+1. 子工作流的全局变量默认值未生效。
\ No newline at end of file

document/content/docs/self-host/upgrading/4-14/meta.json

 {
   "title": "4.14.x",
   "description": "",
-  "pages": ["4149", "4148", "4147", "4146", "41451", "4145", "4144", "4143", "4142", "4141", "4140"]
+  "pages": [
+    "41410",
+    "4149",
+    "4148",
+    "4147",
+    "4146",
+    "41451",
+    "4145",
+    "4144",
+    "4143",
+    "4142",
+    "4141",
+    "4140"
+  ]
 }

document/content/docs/toc.mdx

@@ -112,6 +112,7 @@ description: FastGPT 文档目录
 - [/docs/self-host/upgrading/4-13/4132](/docs/self-host/upgrading/4-13/4132)
 - [/docs/self-host/upgrading/4-14/4140](/docs/self-host/upgrading/4-14/4140)
 - [/docs/self-host/upgrading/4-14/4141](/docs/self-host/upgrading/4-14/4141)
+- [/docs/self-host/upgrading/4-14/41410](/docs/self-host/upgrading/4-14/41410)
 - [/docs/self-host/upgrading/4-14/4142](/docs/self-host/upgrading/4-14/4142)
 - [/docs/self-host/upgrading/4-14/4143](/docs/self-host/upgrading/4-14/4143)
 - [/docs/self-host/upgrading/4-14/4144](/docs/self-host/upgrading/4-14/4144)

document/data/doc-last-modified.json

@@ -239,7 +239,7 @@
   "document/content/docs/self-host/upgrading/4-14/41481.en.mdx": "2026-03-09T12:02:02+08:00",
   "document/content/docs/self-host/upgrading/4-14/41481.mdx": "2026-03-09T17:39:53+08:00",
   "document/content/docs/self-host/upgrading/4-14/4149.en.mdx": "2026-03-23T12:17:04+08:00",
-  "document/content/docs/self-host/upgrading/4-14/4149.mdx": "2026-03-23T23:36:16+08:00",
+  "document/content/docs/self-host/upgrading/4-14/4149.mdx": "2026-03-23T23:36:27+08:00",
   "document/content/docs/self-host/upgrading/outdated/40.en.mdx": "2026-03-03T17:39:47+08:00",
   "document/content/docs/self-host/upgrading/outdated/40.mdx": "2026-03-03T17:39:47+08:00",
   "document/content/docs/self-host/upgrading/outdated/41.en.mdx": "2026-03-03T17:39:47+08:00",

packages/service/core/workflow/dispatch/child/runApp.ts

@@ -13,7 +13,7 @@ import {
 import type { NodeInputKeyEnum } from '@fastgpt/global/core/workflow/constants';
 import { NodeOutputKeyEnum } from '@fastgpt/global/core/workflow/constants';
 import { DispatchNodeResponseKeyEnum } from '@fastgpt/global/core/workflow/runtime/constants';
-import { filterSystemVariables, getNodeErrResponse, getHistories } from '../utils';
+import { getSystemVariables, getNodeErrResponse, getHistories } from '../utils';
 import { chatValue2RuntimePrompt, runtimePrompt2ChatsValue } from '@fastgpt/global/core/chat/adapt';
 import { type DispatchNodeResultType } from '@fastgpt/global/core/workflow/runtime/type';
 import { authAppByTmbId } from '../../../../support/permission/app/auth';
@@ -100,13 +100,23 @@ export const dispatchRunAppNode = async (props: Props): Promise<Response> => {
     const chatHistories = getHistories(history, histories);
 
     // Rewrite children app variables
-    const systemVariables = filterSystemVariables(variables);
     const { externalProvider } = await getUserChatInfo(appData.tmbId);
     const childrenRunVariables = {
-      ...systemVariables,
-      ...childrenAppVariables,
-      histories: chatHistories,
-      appId: String(appData._id),
+      ...(await getSystemVariables({
+        timezone: props.timezone,
+        runningAppInfo: {
+          id: String(appData._id),
+          teamId: appData.teamId,
+          tmbId: appData.tmbId,
+          name: appData.name
+        },
+        chatId: props.chatId,
+        responseChatItemId: props.responseChatItemId,
+        histories: chatHistories,
+        uid: props.uid,
+        chatConfig,
+        variables: childrenAppVariables
+      })),
       ...(externalProvider ? externalProvider.externalWorkflowVariables : {})
     };
 

packages/service/core/workflow/dispatch/index.ts

 import { getNanoid } from '@fastgpt/global/common/string/tools';
-import { getSystemTime } from '@fastgpt/global/common/time/timezone';
 import { SpanStatusCode } from '@opentelemetry/api';
 import type {
   AIChatItemValueItemType,
@@ -12,7 +11,7 @@ import type {
   NodeOutputItemType
 } from '@fastgpt/global/core/workflow/runtime/type';
 import type { NodeOutputKeyEnum } from '@fastgpt/global/core/workflow/constants';
-import { NodeInputKeyEnum, VariableInputEnum } from '@fastgpt/global/core/workflow/constants';
+import { NodeInputKeyEnum } from '@fastgpt/global/core/workflow/constants';
 import {
   FlowNodeInputTypeEnum,
   FlowNodeTypeEnum
@@ -24,8 +23,7 @@ import {
 import type {
   ChatDispatchProps,
   DispatchNodeResultType,
-  ModuleDispatchProps,
-  SystemVariablesType
+  ModuleDispatchProps
 } from '@fastgpt/global/core/workflow/runtime/type';
 import type { RuntimeNodeItemType } from '@fastgpt/global/core/workflow/runtime/type';
 import { getErrText, UserError } from '@fastgpt/global/common/error/utils';
@@ -46,17 +44,21 @@ import type { ChatNodeUsageType } from '@fastgpt/global/support/wallet/bill/type
 import { getLogger, LogCategories } from '../../../common/logger';
 import { surrenderProcess } from '../../../common/system/tools';
 import type { DispatchFlowResponse, WorkflowDebugResponse } from './type';
-import { rewriteRuntimeWorkFlow, runtimeSystemVar2StoreType, filterOrphanEdges } from './utils';
+import {
+  rewriteRuntimeWorkFlow,
+  runtimeSystemVar2StoreType,
+  filterOrphanEdges,
+  getSystemVariables
+} from './utils';
 import { getHandleId } from '@fastgpt/global/core/workflow/utils';
 import { callbackMap } from './constants';
-import { anyValueDecrypt } from '../../../common/secret/utils';
 import { getUserChatInfo } from '../../../support/user/team/utils';
 import { checkTeamAIPoints } from '../../../support/permission/teamLimit';
 import type { UsageSourceEnum } from '@fastgpt/global/support/wallet/usage/constants';
 import { createChatUsageRecord, pushChatItemUsage } from '../../../support/wallet/usage/controller';
 import type { RequireOnlyOne } from '@fastgpt/global/common/type/utils';
 import { getS3ChatSource } from '../../../common/s3/sources/chat';
-import { addPreviewUrlToChatItems, presignVariablesFileUrls } from '../../chat/utils';
+import { addPreviewUrlToChatItems } from '../../chat/utils';
 import { TeamErrEnum } from '@fastgpt/global/common/error/code/team';
 import { i18nT } from '../../../../web/i18n/utils';
 import { validateFileUrlDomain } from '../../../common/security/fileUrlValidator';
@@ -192,10 +194,14 @@ export async function dispatchWorkFlow({
   const defaultVariables = {
     ...externalProvider.externalWorkflowVariables,
     ...(await getSystemVariables({
-      ...data,
-      query,
-      histories,
-      timezone
+      runningAppInfo: runningAppInfo,
+      chatId: chatId,
+      responseChatItemId: data.responseChatItemId,
+      histories: histories,
+      uid: data.uid,
+      chatConfig: data.chatConfig,
+      variables: data.variables,
+      timezone: timezone
     }))
   };
 
@@ -1538,63 +1544,6 @@ export const runWorkflow = async (data: RunWorkflowProps): Promise<DispatchFlowR
   );
 };
 
-/* get system variable */
-const getSystemVariables = async ({
-  timezone,
-  runningAppInfo,
-  chatId,
-  responseChatItemId,
-  histories = [],
-  uid,
-  chatConfig,
-  variables
-}: Props & {
-  timezone: string;
-}): Promise<SystemVariablesType> => {
-  // Get global variables(Label -> key; Key -> key)
-  const variablesConfig = chatConfig?.variables || [];
-
-  const variablesMap: Record<string, any> = {};
-  for await (const item of variablesConfig) {
-    // For internal variables, ignore external input and use default value
-    if (item.type === VariableInputEnum.password) {
-      const val = variables[item.label] || variables[item.key] || item.defaultValue;
-      const actualValue = anyValueDecrypt(val);
-      variablesMap[item.key] = valueTypeFormat(actualValue, item.valueType);
-    }
-    //  文件类型全局变量，签发成 string[] 格式
-    else if (item.type === VariableInputEnum.file) {
-      const vars = await presignVariablesFileUrls({
-        variables,
-        variableConfig: [item]
-      });
-
-      variablesMap[item.key] = vars?.[item.key]?.map((item: any) => item.url);
-    }
-    // API
-    else if (variables[item.label] !== undefined) {
-      variablesMap[item.key] = valueTypeFormat(variables[item.label], item.valueType);
-    }
-    // Web
-    else if (variables[item.key] !== undefined) {
-      variablesMap[item.key] = valueTypeFormat(variables[item.key], item.valueType);
-    } else {
-      variablesMap[item.key] = valueTypeFormat(item.defaultValue, item.valueType);
-    }
-  }
-
-  return {
-    ...variablesMap,
-    // System var:
-    userId: uid,
-    appId: String(runningAppInfo.id),
-    chatId,
-    responseChatItemId,
-    histories,
-    cTime: getSystemTime(timezone)
-  };
-};
-
 /* Merge consecutive text messages into one */
 const mergeAssistantResponseAnswerText = (response: AIChatItemValueItemType[]) => {
   const result: AIChatItemValueItemType[] = [];

packages/service/core/workflow/dispatch/utils.ts

@@ -6,6 +6,8 @@ import { NodeOutputKeyEnum, VariableInputEnum } from '@fastgpt/global/core/workf
 import type { VariableItemType } from '@fastgpt/global/core/app/type';
 import { encryptSecret } from '../../../common/secret/aes256gcm';
 import { imageFileType } from '@fastgpt/global/common/file/constants';
+import type {
+  ChatDispatchProps} from '@fastgpt/global/core/workflow/runtime/type';
 import {
   type RuntimeNodeItemType,
   type SystemVariablesType
@@ -30,6 +32,74 @@ import type { ChatNodeUsageType } from '@fastgpt/global/support/wallet/bill/type
 import type { HttpToolConfigType } from '@fastgpt/global/core/app/tool/httpTool/type';
 import type { WorkflowResponseType } from './type';
 import { getLogger, LogCategories } from '../../../common/logger';
+import { anyValueDecrypt } from '../../../common/secret/utils';
+import { valueTypeFormat } from '@fastgpt/global/core/workflow/runtime/utils';
+import { presignVariablesFileUrls } from '../../chat/utils';
+import { getSystemTime } from '@fastgpt/global/common/time/timezone';
+
+/* get system variable */
+export const getSystemVariables = async ({
+  timezone,
+  runningAppInfo,
+  chatId,
+  responseChatItemId,
+  histories = [],
+  uid,
+  chatConfig,
+  variables
+}: {
+  runningAppInfo: ChatDispatchProps['runningAppInfo'];
+  chatId: ChatDispatchProps['chatId'];
+  responseChatItemId: ChatDispatchProps['responseChatItemId'];
+  histories: ChatDispatchProps['histories'];
+  uid: ChatDispatchProps['uid'];
+  chatConfig: ChatDispatchProps['chatConfig'];
+  variables: ChatDispatchProps['variables'];
+  timezone: string;
+}): Promise<SystemVariablesType> => {
+  // Get global variables(Label -> key; Key -> key)
+  const variablesConfig = chatConfig?.variables || [];
+
+  const variablesMap: Record<string, any> = {};
+  for await (const item of variablesConfig) {
+    // For internal variables, ignore external input and use default value
+    if (item.type === VariableInputEnum.password) {
+      const val = variables[item.label] || variables[item.key] || item.defaultValue;
+      const actualValue = anyValueDecrypt(val);
+      variablesMap[item.key] = valueTypeFormat(actualValue, item.valueType);
+    }
+    //  文件类型全局变量，签发成 string[] 格式
+    else if (item.type === VariableInputEnum.file) {
+      const vars = await presignVariablesFileUrls({
+        variables,
+        variableConfig: [item]
+      });
+
+      variablesMap[item.key] = vars?.[item.key]?.map((item: any) => item.url);
+    }
+    // API
+    else if (variables[item.label] !== undefined) {
+      variablesMap[item.key] = valueTypeFormat(variables[item.label], item.valueType);
+    }
+    // Web
+    else if (variables[item.key] !== undefined) {
+      variablesMap[item.key] = valueTypeFormat(variables[item.key], item.valueType);
+    } else {
+      variablesMap[item.key] = valueTypeFormat(item.defaultValue, item.valueType);
+    }
+  }
+
+  return {
+    ...variablesMap,
+    // System var:
+    userId: uid,
+    appId: String(runningAppInfo.id),
+    chatId,
+    responseChatItemId,
+    histories,
+    cTime: getSystemTime(timezone)
+  };
+};
 
 export const getWorkflowResponseWrite = ({
   res,