LangChain Code node methods#

n8n มี methods เหล่านี้เพื่อให้ง่ายต่อการทำงานทั่วไปใน LangChain Code node

LangChain Code node only

Variables เหล่านี้ใช้สำหรับ expressions ใน LangChain Code node เท่านั้น คุณไม่สามารถใช้ใน node อื่นๆ ได้

Method	Description
`this.addInputData(inputName, data)`	Populate the data of a specified non-main input. Useful for mocking data. `inputName` is the input connection type, and must be one of: `ai_agent`, `ai_chain`, `ai_document`, `ai_embedding`, `ai_languageModel`, `ai_memory`, `ai_outputParser`, `ai_retriever`, `ai_textSplitter`, `ai_tool`, `ai_vectorRetriever`, `ai_vectorStore` `data` contains the data you want to add. Refer to Data structure for information on the data structure expected by n8n.
`this.addOutputData(outputName, data)`	Populate the data of a specified non-main output. Useful for mocking data. `outputName` is the input connection type, and must be one of: `ai_agent`, `ai_chain`, `ai_document`, `ai_embedding`, `ai_languageModel`, `ai_memory`, `ai_outputParser`, `ai_retriever`, `ai_textSplitter`, `ai_tool`, `ai_vectorRetriever`, `ai_vectorStore` `data` contains the data you want to add. Refer to Data structure for information on the data structure expected by n8n.
`this.getInputConnectionData(inputName, itemIndex, inputIndex?)`	Get data from a specified non-main input. `inputName` is the input connection type, and must be one of: `ai_agent`, `ai_chain`, `ai_document`, `ai_embedding`, `ai_languageModel`, `ai_memory`, `ai_outputParser`, `ai_retriever`, `ai_textSplitter`, `ai_tool`, `ai_vectorRetriever`, `ai_vectorStore` `itemIndex` should always be `0` (this parameter will be used in upcoming functionality) Use `inputIndex` if there is more than one node connected to the specified input.
`this.getInputData(inputIndex?, inputName?)`	Get data from the main input.
`this.getNode()`	Get the current node.
`this.getNodeOutputs()`	Get the outputs of the current node.
`this.getExecutionCancelSignal()`	Use this to stop the execution of a function when the workflow stops. In most cases n8n handles this, but you may need to use it if building your own chains or agents. It replaces the Cancelling a running LLMChain code that you'd use if building a LangChain application normally.