Query Parameters in FastAPI
Explore the role of query parameters in FastAPI and learn how to implement them in your Python APIs. Understand how FastAPI automatically parses and validates parameter types, and discover ways to handle required, default, and optional query parameters to avoid errors during API calls.
We'll cover the following...
We'll cover the following...
Introduction to query parameters?
Query parameters are optional parameters, which are some key-value pairs that appear after the question mark(?) in the URL.
Note that the question mark sign is used to separate path and query parameters.
In FastAPI, other function parameters that are not declared part of the path parameters are automatically interpreted as query parameters. Let us see the code below to understand them.
from fastapi import FastAPI
app = FastAPI()
course_items = [{"course_name": "Python"}, {"course_name": "NodeJS"}, {"course_name": "Machine Learning"}]
@app.get("/courses/")
def read_courses(start: int, end: int):
return course_items[start : start + end]Query parameters in FastAPI
The query ...