Class that represents a transform chain. It extends the BaseChain class and implements the TransformChainFields interface. It provides a way to transform input values to output values using a specified transform function.

Deprecated

Switch to expression language. Will be removed in 0.2.0

Type Parameters

  • I extends ChainValues

  • O extends ChainValues

Hierarchy (view full)

Constructors

Properties

inputVariables: (keyof I extends string
    ? keyof any
    : never)[]
outputVariables: (keyof O extends string
    ? keyof any
    : never)[]
transformFunc: ((values, callbacks?) => O | Promise<O>)

Type declaration

    • (values, callbacks?): O | Promise<O>
    • Parameters

      • values: I
      • Optional callbacks: CallbackManager | (BaseCallbackHandler | BaseCallbackHandlerMethodsClass)[]

      Returns O | Promise<O>

memory?: BaseMemory

Accessors

  • get inputKeys(): (keyof I extends string
        ? keyof any
        : never)[]
  • Returns (keyof I extends string
        ? keyof any
        : never)[]

  • get outputKeys(): (keyof O extends string
        ? keyof any
        : never)[]
  • Returns (keyof O extends string
        ? keyof any
        : never)[]

Methods

  • Parameters

    • inputs: ChainValues[]
    • Optional config: (RunnableConfig | CallbackManager | (BaseCallbackHandler | BaseCallbackHandlerMethodsClass)[])[]

    Returns Promise<ChainValues[]>

    ⚠️ Deprecated ⚠️

    Use .batch() instead. Will be removed in 0.2.0.

    This feature is deprecated and will be removed in the future.

    It is not recommended for use.

    Call the chain on all inputs in the list

  • Parameters

    • values: ChainValues & {
          signal?: AbortSignal;
          timeout?: number;
      }
    • Optional config: RunnableConfig | CallbackManager | (BaseCallbackHandler | BaseCallbackHandlerMethodsClass)[]
    • Optional tags: string[]

      Deprecated

    Returns Promise<ChainValues>

    Deprecated

    Use .invoke() instead. Will be removed in 0.2.0.

    Run the core logic of this chain and add to output if desired.

    Wraps _call and handles memory.

  • Invoke the chain with the provided input and returns the output.

    Parameters

    • input: ChainValues

      Input values for the chain run.

    • Optional options: RunnableConfig

    Returns Promise<ChainValues>

    Promise that resolves with the output of the chain run.

  • Parameters

    • inputs: Record<string, unknown>
    • outputs: Record<string, unknown>
    • returnOnlyOutputs: boolean = false

    Returns Promise<Record<string, unknown>>

  • Parameters

    • input: any
    • Optional config: RunnableConfig | CallbackManager | (BaseCallbackHandler | BaseCallbackHandlerMethodsClass)[]

    Returns Promise<string>

    Deprecated

    Use .invoke() instead. Will be removed in 0.2.0.

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