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执行子工作流触发节点#

¥Execute Sub-workflow Trigger node

使用此节点响应另一个工作流启动工作流。它应该是工作流中的第一个节点。

¥Use this node to start a workflow in response to another workflow. It should be the first node in the workflow.

n8n 允许你从其他工作流调用工作流。如果你想要执行以下操作，这将非常有用：

¥n8n allows you to call workflows from other workflows. This is useful if you want to:

  • 重用工作流程：例如，你可以创建多个工作流，分别从不同的数据源提取和处理数据，然后让所有这些工作流调用一个生成报告的工作流。

¥Reuse a workflow: for example, you could have multiple workflows pulling and processing data from different sources, then have all those workflows call a single workflow that generates a report.

  • 将大型工作流拆分为更小的组件。

¥Break large workflows into smaller components.

用法#

¥Usage

此节点响应 执行子工作流 或 调用 n8n 工作流工具 节点的调用而运行。

¥This node runs in response to a call from the Execute Sub-workflow or Call n8n Workflow Tool nodes.

Create the sub-workflow#

  1. Create a new workflow.

    Create sub-workflows from existing workflows

    You can optionally create a sub-workflow directly from an existing parent workflow using the Execute Sub-workflow node. In the node, select the Database and From list options and select Create a sub-workflow in the list.

    You can also extract selected nodes directly using Sub-workflow conversion in the context menu.

  2. Optional: configure which workflows can call the sub-workflow:

    1. Select the Options Options menu menu > Settings. n8n opens the Workflow settings modal.
    2. Change the This workflow can be called by setting. Refer to Workflow settings for more information on configuring your workflows.
  3. Add the Execute Sub-workflow trigger node (if you are searching under trigger nodes, this is also titled When Executed by Another Workflow).
  4. Set the Input data mode to choose how you will define the sub-workflow's input data:
    • Define using fields below: Choose this mode to define individual input names and data types that the calling workflow needs to provide. The Execute Sub-workflow node or Call n8n Workflow Tool node in the calling workflow will automatically pull in the fields defined here.
    • Define using JSON example: Choose this mode to provide an example JSON object that demonstrates the expected input items and their types.
    • Accept all data: Choose this mode to accept all data unconditionally. The sub-workflow won't define any required input items. This sub-workflow must handle any input inconsistencies or missing values.
  5. Add other nodes as needed to build your sub-workflow functionality.
  6. Save the sub-workflow.

Sub-workflow mustn't contain errors

If there are errors in the sub-workflow, the parent workflow can't trigger it.

Load data into sub-workflow before building

This requires the ability to load data from previous executions, which is available on n8n Cloud and registered Community plans.

If you want to load data into your sub-workflow to use while building it:

  1. Create the sub-workflow and add the Execute Sub-workflow Trigger.
  2. Set the node's Input data mode to Accept all data or define the input items using fields or JSON if they're already known.
  3. In the sub-workflow settings, set Save successful production executions to Save.
  4. Skip ahead to setting up the parent workflow, and run it.
  5. Follow the steps to load data from previous executions.
  6. Adjust the Input data mode to match the input sent by the parent workflow if necessary.

You can now pin example data in the trigger node, enabling you to work with real data while configuring the rest of the workflow.

Call the sub-workflow#

  1. Open the workflow where you want to call the sub-workflow.
  2. Add the Execute Sub-workflow node.

  3. In the Execute Sub-workflow node, set the sub-workflow you want to call. You can choose to call the workflow by ID, load a workflow from a local file, add workflow JSON as a parameter in the node, or target a workflow by URL.

    Find your workflow ID

    Your sub-workflow's ID is the alphanumeric string at the end of its URL.

  4. Fill in the required input items defined by the sub-workflow.

  5. Save your workflow.

When your workflow executes, it will send data to the sub-workflow, and run it.

You can follow the execution flow from the parent workflow to the sub-workflow by opening the Execute Sub-workflow node and selecting the View sub-execution link. Likewise, the sub-workflow's execution contains a link back to the parent workflow's execution to navigate in the other direction.

模板和示例#

¥Templates and examples

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数据如何在工作流之间传递#

¥How data passes between workflows

As an example, imagine you have an Execute Sub-workflow node in Workflow A. The Execute Sub-workflow node calls another workflow called Workflow B:

  1. The Execute Sub-workflow node passes the data to the Execute Sub-workflow Trigger node (titled "When executed by another node" in the canvas) of Workflow B.
  2. The last node of Workflow B sends the data back to the Execute Sub-workflow node in Workflow A.