Inputs

Input and output components define where data enters and exits your flow.

Both Text Input and Chat Input components accept user input and return a Message object, but they serve different purposes.

The Text Input component accepts a text string input and returns a Message object containing only the input text. The output does not appear in the Playground.

The Chat Input component accepts multiple input types including text, files, and metadata, and returns a Message object containing the text along with sender information, session ID, and file attachments.

The Chat Input component provides an interactive chat interface in the Playground.

Chat input

This component collects user input as Text strings from the chat and wraps it in a Message object that includes the input text, sender information, session ID, file attachments.

It can optionally store the message in a chat history.

Parameters

Inputs
Name	Display Name	Info
background_color	Background Color	The background color of the icon.
chat_icon	Icon	The icon of the message.
files	Files	Files to be sent with the message.
input_value	Text	The message to be passed as input. Accepts text, data objects, messages, and dataframes.
sender	Sender Type	The type of sender.
sender_name	Sender Name	The name of the sender.
session_id	Session ID	The session ID of the chat. If empty, the current session_id parameter is used.
should_store_message	Store Messages	Store the message in the history.
text_color	Text Color	The text color of the name.

Outputs
Name	Display Name	Info
message	Message	The response message.

Message method

The ChatInput class provides an asynchronous method to create and store a Message object based on the input parameters. The Message object is created in the message_response method of the ChatInput class using the Message.create() factory method. The user’s input is stored in the input_value field of the Message object.

message = await Message.create(
    text=self.input_value,
    sender=self.sender,
    sender_name=self.sender_name,
    session_id=self.session_id,
    files=self.files,
    properties={
        "background_color": background_color,
        "text_color": text_color,
        "icon": icon,
    },
)

Component code

chat.py

from langflow.base.data.utils import IMG_FILE_TYPES, TEXT_FILE_TYPES
from langflow.base.io.chat import ChatComponent
from langflow.inputs import BoolInput
from langflow.io import (
    DropdownInput,
    FileInput,
    MessageTextInput,
    MultilineInput,
    Output,
)
from langflow.schema.message import Message
from langflow.utils.constants import (
    MESSAGE_SENDER_AI,
    MESSAGE_SENDER_NAME_USER,
    MESSAGE_SENDER_USER,
)


class ChatInput(ChatComponent):
    display_name = "Chat Input"
    description = "Get chat inputs from the Playground."
    icon = "MessagesSquare"
    name = "ChatInput"
    minimized = True

    inputs = [
        MultilineInput(
            name="input_value",
            display_name="Text",
            value="",
            info="Message to be passed as input.",
            input_types=[],
        ),
        BoolInput(
            name="should_store_message",
            display_name="Store Messages",
            info="Store the message in the history.",
            value=True,
            advanced=True,
        ),
        DropdownInput(
            name="sender",
            display_name="Sender Type",
            options=[MESSAGE_SENDER_AI, MESSAGE_SENDER_USER],
            value=MESSAGE_SENDER_USER,
            info="Type of sender.",
            advanced=True,
        ),
        MessageTextInput(
            name="sender_name",
            display_name="Sender Name",
            info="Name of the sender.",
            value=MESSAGE_SENDER_NAME_USER,
            advanced=True,
        ),
        MessageTextInput(
            name="session_id",
            display_name="Session ID",
            info="The session ID of the chat. If empty, the current session ID parameter will be used.",
            advanced=True,
        ),
        FileInput(
            name="files",
            display_name="Files",
            file_types=TEXT_FILE_TYPES + IMG_FILE_TYPES,
            info="Files to be sent with the message.",
            advanced=True,
            is_list=True,
        ),
        MessageTextInput(
            name="background_color",
            display_name="Background Color",
            info="The background color of the icon.",
            advanced=True,
        ),
        MessageTextInput(
            name="chat_icon",
            display_name="Icon",
            info="The icon of the message.",
            advanced=True,
        ),
        MessageTextInput(
            name="text_color",
            display_name="Text Color",
            info="The text color of the name",
            advanced=True,
        ),
    ]
    outputs = [
        Output(display_name="Message", name="message", method="message_response"),
    ]

    async def message_response(self) -> Message:
        background_color = self.background_color
        text_color = self.text_color
        icon = self.chat_icon

        message = await Message.create(
            text=self.input_value,
            sender=self.sender,
            sender_name=self.sender_name,
            session_id=self.session_id,
            files=self.files,
            properties={
                "background_color": background_color,
                "text_color": text_color,
                "icon": icon,
            },
        )
        if self.session_id and isinstance(message, Message) and self.should_store_message:
            stored_message = await self.send_message(
                message,
            )
            self.message.value = stored_message
            message = stored_message

        self.status = message
        return message

Text Input

The Text Input component accepts a text string input and returns a Message object containing only the input text.

The output does not appear in the Playground.

Parameters

Inputs
Name	Display Name	Info
input_value	Text	The text to be passed as input.

Outputs
Name	Display Name	Info
text	Text	The response message containing the input text.

Component code

text.py

from langflow.base.io.text import TextComponent
from langflow.io import MultilineInput, Output
from langflow.schema.message import Message


class TextInputComponent(TextComponent):
    display_name = "Text Input"
    description = "Get text inputs from the Playground."
    icon = "type"
    name = "TextInput"

    inputs = [
        MultilineInput(
            name="input_value",
            display_name="Text",
            info="Text to be passed as input.",
        ),
    ]
    outputs = [
        Output(display_name="Message", name="text", method="text_response"),
    ]

    def text_response(self) -> Message:
        return Message(
            text=self.input_value,
        )

Inputs

Chat input

Parameters

Message method

Component code

Text Input

Parameters

Component code

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