422 Unprocessable Entity in Rest API - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return a 422 status when the input data is invalid.

Rest API

if not valid_data:
    return {'error': 'Invalid input'}, [1]

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

A422

B404

C200

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using 404 instead of 422 for invalid input.

Returning 200 OK even when input is invalid.

The HTTP status code 422 means the server understands the content type and syntax but cannot process the instructions due to semantic errors.

2fill in blank

medium

Complete the code to check for missing required fields and respond with 422.

Rest API

required_fields = ['name', 'email']
if any(field not in data for field in [1]):
    return {'error': 'Missing fields'}, 422

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

Arequired_fields

Bfields

Crequest

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Checking keys in the wrong variable.

Using the data variable instead of the list of required fields.

We check if any required field is missing in the input data by iterating over the list of required fields.

3fill in blank

hard

Fix the error in the code to correctly return a 422 response with a JSON error message.

Rest API

def handle_request(data):
    if not is_valid(data):
        return [1]

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

Areturn 422

B({'error': 'Invalid data'}, 422)

C422, {'error': 'Invalid data'}

Djsonify({'error': 'Invalid data'}), 422

Attempts:

3 left

💡 Hint

Common Mistakes

Returning status code before the response body.

Not using a JSON formatter function.

Using jsonify formats the response as JSON and returns the correct status code.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that filters valid fields and returns 422 if any are missing.

Rest API

filtered_data = {field: data[field] for field in data if field [1] required_fields}
if len(filtered_data) [2] len(required_fields):
    return {'error': 'Missing required fields'}, 422

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

Ain

B==

C<

Dnot in

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'not in' instead of 'in' in the comprehension.

Using '==' instead of '<' to check missing fields.

The comprehension keeps fields that are in required_fields. Then it checks if filtered_data has fewer fields than required_fields, meaning some are missing.

5fill in blank

hard

Fill all three blanks to create a function that validates input and returns 422 with a message if invalid.

Rest API

def validate_input(data):
    errors = {field: 'Required' for field in [1] if field not in [2]
    if errors:
        return [3], 422
    return None

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

Arequired_fields

Bdata

C{'errors': errors}

Dfields

Attempts:

3 left

💡 Hint

Common Mistakes

Checking fields in the wrong variable.

Returning errors without wrapping in a dictionary.

The function checks which required fields are missing from data, collects errors, and returns them with a 422 status if any are missing.