Numeric validation (gt, lt, ge, le) in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to require the query parameter 'age' to be greater than 18.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/items/")
async def read_items(age: int = Query(..., gt=[1])):
    return {"age": age}

Drag options to blanks, or click blank then click option'

A18

B0

C21

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using ge instead of gt changes the condition to 'greater or equal'.

Setting the value to less than 18 allows younger ages.

The gt parameter in Query sets the minimum value that the query parameter must be greater than. Here, it is set to 18.

2fill in blank

medium

Complete the code to require the query parameter 'price' to be less than 100.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/products/")
async def get_products(price: float = Query(..., lt=[1])):
    return {"price": price}

Drag options to blanks, or click blank then click option'

A50

B100

C150

D200

Attempts:

3 left

💡 Hint

Common Mistakes

Using le instead of lt allows price equal to 100.

Setting the value higher than 100 does not restrict prices below 100.

The lt parameter means 'less than'. Setting lt=100 means the price must be below 100.

3fill in blank

hard

Fix the error in the code to require 'quantity' to be greater or equal to 1.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/orders/")
async def get_orders(quantity: int = Query(..., [1]=1)):
    return {"quantity": quantity}

Drag options to blanks, or click blank then click option'

Ale

Bgt

Cge

Dlt

Attempts:

3 left

💡 Hint

Common Mistakes

Using gt excludes 1 from valid values.

Using le or lt sets upper limits instead.

The ge parameter means 'greater or equal'. Setting ge=1 allows quantity 1 or more.

4fill in blank

hard

Fill both blanks to require 'rating' to be between 1 and 5 inclusive.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/reviews/")
async def get_reviews(rating: int = Query(..., [1]=1, [2]=5)):
    return {"rating": rating}

Drag options to blanks, or click blank then click option'

Age

Bgt

Cle

Dlt

Attempts:

3 left

💡 Hint

Common Mistakes

Using gt or lt excludes boundary values.

Swapping the order of parameters causes errors.

Use ge=1 for minimum value 1 and le=5 for maximum value 5, both inclusive.

5fill in blank

hard

Fill all three blanks to require 'score' to be greater than 0, less than or equal to 100, and default to 50.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/scores/")
async def get_scores(score: int = Query([1], gt=[2], [3]=100)):
    return {"score": score}

Drag options to blanks, or click blank then click option'

A50

B0

Cle

Dlt

Attempts:

3 left

💡 Hint

Common Mistakes

Using lt instead of le excludes 100.

Setting default value outside the valid range causes errors.

The default value is set to 50. The score must be greater than 0 (gt=0) and less than or equal to 100 (le=100).