# ai_index_orgs_users_documents_train_sessions_create

Description:
Submit a document file  in a chat session. Checks file type, size, and ensures the session exists, then processes the file.
Process  document for use in a specific chat session.
which will be processed and made available for the AI to reference
when responding to queries in that session.

Methods:
- POST: Submits a document or media file for training within a specified chat session.

Parameters:
- org (str):
- session_id (str): UUID of the chat session for which the document is being submitted.
- *kwargs: Additional arguments.
- file (file): Multipart file input.

Returns:
- POST: Returns a JSON message with the result of the upload process. Response code 200 on success.
{
    "message": "File processed."
}

Error Responses:
- 400 Bad Request:
- "File field is required" if the 'file' parameter is missing.
- "invalid file object" if the file object is not valid.
- Specific error message if an exception occurs while saving to Redis.
- 404 Not Found:
- "Session not found" if the provided session_id does not match any existing session.
- 413 Request Entity Too Large:
- "file is too large" including specific limits for document and media files if the file exceeds size limits.

Access Control:
Requires authentication with a Bearer token in the Authorization header. The user associated with the session must exist and be authorized for the request.

Endpoint: POST /api/ai-index/orgs/{org}/users/{user_id}/documents/train/sessions/{session_id}/
Version: 3.59.0-ai-plus
Security: PlatformApiKeyAuthentication

## Path parameters:

  - `org` (string, required)

  - `session_id` (string, required)

  - `user_id` (string, required)

## Request fields (multipart/form-data):

  - `file` (string, required)
    File to be trained

## Response 200 fields (application/json):

  - `message` (string, required)
    Message of the training