langflow/docs/docs/Components/components-helpers.md

title	sidebar_position	slug
Helpers	4	/components-helpers

Helpers

Helper components provide utility functions to help manage data, tasks, and other components in your flow.

Chat Memory

This component retrieves and manages chat messages from Langflow tables or an external memory.

Parameters

Inputs

Name	Display Name	Info
memory	External Memory	Retrieve messages from an external memory. If empty, it will use the Langflow tables.
sender	Sender Type	Filter by sender type.
sender_name	Sender Name	Filter by sender name.
n_messages	Number of Messages	Number of messages to retrieve.
session_id	Session ID	The session ID of the chat. If empty, the current session ID parameter will be used.
order	Order	Order of the messages.
template	Template	The template to use for formatting the data. It can contain the keys {text}, {sender} or any other key in the message data.

Outputs

Name	Display Name	Info
messages	Messages (Data)	Retrieved messages as Data objects.
messages_text	Messages (Text)	Retrieved messages formatted as text.
lc_memory	Memory	Built LangChain memory object.

Combine Text

This component concatenates two text sources into a single text chunk using a specified delimiter.

Parameters

Inputs

Name	Display Name	Info
first_text	First Text	The first text input to concatenate.
second_text	Second Text	The second text input to concatenate.
delimiter	Delimiter	A string used to separate the two text inputs. Defaults to a space.

Create List

This component dynamically creates a record with a specified number of fields.

Parameters

Inputs

Name	Display Name	Info
n_fields	Number of Fields	Number of fields to be added to the record.
text_key	Text Key	Key used as text.

Custom Component

Use this component as a template to create your custom component.

Filter Data

This component converts LangChain documents into Data.

Hierarchical Task

This component creates and manages hierarchical tasks for CrewAI agents in a Playground environment.

For more information, see the CrewAI documentation.

Parameters

Inputs

Name	Display Name	Info
task_description	Description	Descriptive text detailing task's purpose and execution.
expected_output	Expected Output	Clear definition of expected task outcome.
tools	Tools	List of tools/resources limited for task execution. Uses the Agent tools by default.

Outputs

Name	Display Name	Info
task_output	Task	The built hierarchical task.

ID Generator

This component generates a unique ID.

Parameters

Outputs

Name	Display Name	Info
value	Value	Unique ID generated.

Merge Data

Parse Data

The ParseData component converts Data objects into plain text using a specified template. This component transforms structured data into human-readable text formats, allowing for customizable output through the use of templates.

Parameters

Inputs

Name	Display Name	Info
data	Data	The data to convert to text
template	Template	The template to use for formatting the data. It can contain the keys {text}, {data} or any other key in the Data
sep	Separator	The separator to use between multiple data items

Outputs

Name	Display Name	Info
text	Text	The resulting formatted text string as a Message object

Sequential Task

This component creates and manage sequential tasks for CrewAI agents. It builds a SequentialTask object with the provided description, expected output, and agent, allowing for the specification of tools and asynchronous execution.

For more information, see the CrewAI documentation.

Parameters

Inputs

Name	Display Name	Info
task_description	Description	Descriptive text detailing task's purpose and execution.
expected_output	Expected Output	Clear definition of expected task outcome.
tools	Tools	List of tools/resources limited for task execution. Uses the Agent tools by default.
agent	Agent	CrewAI Agent that will perform the task.
task	Task	CrewAI Task that will perform the task.
async_execution	Async Execution	Boolean flag indicating asynchronous task execution.

Outputs

Name	Display Name	Info
task_output	Task	The built sequential task or list of tasks.

Split Text

This component splits text into chunks of a specified length.

Parameters

Inputs

Name	Display Name	Info
texts	Texts	Texts to split.
separators	Separators	Characters to split on. Defaults to a space.
max_chunk_size	Max Chunk Size	The maximum length (in characters) of each chunk.
chunk_overlap	Chunk Overlap	The amount of character overlap between chunks.
recursive	Recursive	Whether to split recursively.

Store Message

This component stores chat messages or text into Langflow tables or an external memory.

It provides flexibility in managing message storage and retrieval within a chat system.

Parameters

Inputs

Name	Display Name	Info
message	Message	The chat message to be stored. (Required)
memory	External Memory	The external memory to store the message. If empty, it will use the Langflow tables.
sender	Sender	The sender of the message. Can be Machine or User. If empty, the current sender parameter will be used.
sender_name	Sender Name	The name of the sender. Can be AI or User. If empty, the current sender parameter will be used.
session_id	Session ID	The session ID of the chat. If empty, the current session ID parameter will be used.

Outputs

Name	Display Name	Info
stored_messages	Stored Messages	The list of stored messages after the current message has been added.