Serializer validation in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the base serializer class.

Django

from rest_framework import [1]

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

Aviews

Bserializers

Cmodels

Dfields

Attempts:

3 left

💡 Hint

Common Mistakes

Importing views instead of serializers

Importing models which is unrelated to serializers

The serializers module contains the base serializer classes needed to create serializers.

2fill in blank

medium

Complete the serializer class to validate that the 'age' field is at least 18.

Django

class UserSerializer(serializers.Serializer):
    age = serializers.IntegerField()

    def validate_age(self, value):
        if value < [1]:
            raise serializers.ValidationError("Must be at least 18 years old.")
        return value

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

A18

B20

C16

D21

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong age number like 21 or 16

Not raising ValidationError when age is less

The validation requires the age to be at least 18, so the check is value < 18.

3fill in blank

hard

Fix the error in the serializer's validate method to check that 'start_date' is before 'end_date'.

Django

class EventSerializer(serializers.Serializer):
    start_date = serializers.DateField()
    end_date = serializers.DateField()

    def validate(self, data):
        if data['start_date'] > data[[1]]:
            raise serializers.ValidationError("start_date must be before end_date.")
        return data

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

A'start_date'

B'date'

C'finish_date'

D'end_date'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong key like 'start_date' or 'date'

Using a key that does not exist in the data dictionary

The code compares start_date with end_date, so the key must be 'end_date'.

4fill in blank

hard

Fill both blanks to add a custom validation that checks 'email' contains '@' and raise an error if not.

Django

class EmailSerializer(serializers.Serializer):
    email = serializers.CharField()

    def validate_email(self, value):
        if [1] not in value:
            raise serializers.ValidationError("Invalid email address.")
        return [2]

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

A'@'

Bvalue

Cemail

D'#'

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for wrong character like '#'

Returning a wrong variable name instead of value

The code checks if '@' is in the email string and returns the original value if valid.

5fill in blank

hard

Fill all three blanks to create a serializer that validates 'username' length and 'password' confirmation.

Django

class RegisterSerializer(serializers.Serializer):
    username = serializers.CharField()
    password = serializers.CharField(write_only=True)
    password2 = serializers.CharField(write_only=True)

    def validate_username(self, value):
        if len(value) < [1]:
            raise serializers.ValidationError("Username too short.")
        return value

    def validate(self, data):
        if data[[2]] != data[[3]]:
            raise serializers.ValidationError("Passwords do not match.")
        return data

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

A5

B'password'

C'password2'

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Using too small a number for username length

Mixing up password field names in validation

The username must be at least 5 characters. The validate method compares 'password' and 'password2' fields for equality.