Class TransformChain<I, O>

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

constructor

Properties

inputVariables outputVariables transformFunc memory?

Accessors

inputKeys outputKeys

Methods

apply call invoke prepOutputs run serialize deserialize

Constructors

constructor

Properties

inputVariables

inputVariables: (keyof I extends string
    ? keyof any
    : never)[]

outputVariables

outputVariables: (keyof O extends string
    ? keyof any
    : never)[]

transformFunc

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>

Optional memory

memory?: BaseMemory

Accessors

inputKeys

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

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

outputKeys

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

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

Methods

apply

  • apply(inputs, config?): Promise<ChainValues[]>

  • 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

call

  • call(values, config?, tags?): Promise<ChainValues>

  • 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

  • invoke(input, options?): Promise<ChainValues>

  • 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.

prepOutputs

  • prepOutputs(inputs, outputs, returnOnlyOutputs?): Promise<Record<string, unknown>>

  • Parameters

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

    Returns Promise<Record<string, unknown>>

run

  • run(input, config?): Promise<string>

  • Parameters

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

    Returns Promise<string>

    Deprecated

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

serialize

Static deserialize

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