Customizing the response
In the previous sections, you learned that directly returning a dictionary or a Pydantic object in your path operation function was enough for FastAPI to return a JSON response.
Most of the time, you’ll want to customize this response a bit further; for instance, by changing the status code, raising validation errors, and setting cookies. FastAPI offers different ways to do this, from the simplest case to the most advanced one. First, we’ll learn how to customize the response declaratively by using path operation parameters.
Path operation parameters
In the Creating a first endpoint and running it locally section, you learned that in order to create a new endpoint, you had to put a decorator on top of the path operation function. This decorator accepts a lot of options, including ones to customize the response.
The status code
The most obvious thing to customize in an HTTP response is the status code. By default, FastAPI will always...
