FASTAPI: what is`(..)` in the Body(...) while reading from a post request?

Question

I am trying to read body from my POST request using FastAPI. However i am not able to understand what (...) argument for the Body function

Here is my code:

@app.post('/createPosts')
def create_post(payload: dict = Body(...)):
    print(payload)
    return {'message': 'succesfully created post'}

Answer 1

Probably duplicated question. Here is another one:

What does the Ellipsis object do?

It is part of Python, not FastAPI

Answer 2

... (Ellipsis) was the way of declaring a required parameter in FastAPI.
However, from 0.78.0, you can just omit the default value to do that.

See release note and documentation for details.