Model inheritance in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a base Pydantic model class.

FastAPI

from pydantic import BaseModel

class UserBase([1]):
    username: str
    email: str

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

ABaseModel

BModel

CBase

DModelBase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Model' or 'ModelBase' which are not valid Pydantic base classes.

Using 'Base' alone which is incomplete.

The base class for Pydantic models is BaseModel. It provides data validation and parsing.

2fill in blank

medium

Complete the code to create a model that inherits from UserBase and adds an id field.

FastAPI

class UserCreate(UserBase):
    id: [1]

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Abool

Bstr

Cint

Dfloat

Attempts:

3 left

💡 Hint

Common Mistakes

Using str for id which is usually numeric.

Using float or bool which are not typical for IDs.

The id field is usually an integer identifier.

3fill in blank

hard

Fix the error in the model inheritance syntax.

FastAPI

class UserResponse([1]):
    id: int
    username: str
    email: str

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AUserBase()

BBaseModel()

CBaseModel

DUserBase

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses after the base class name in class definition.

Using the wrong base class.

When inheriting a class in Python, do not use parentheses with arguments unless calling a function. Use just the class name.

4fill in blank

hard

Fill both blanks to create a model that inherits from UserBase and adds an optional age field.

FastAPI

from typing import [1]

class UserProfile([2]):
    age: [1][int] = None

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AOptional

BUserBase

CDict

DSet

Attempts:

3 left

💡 Hint

Common Mistakes

Using List or Dict instead of Optional for optional fields.

Not inheriting from UserBase.

To allow a field to be optional (can be None), use Optional from typing. The model inherits from UserBase.

5fill in blank

hard

Fill all three blanks to create a model that inherits from UserBase, adds a list of tags, and a method to return username in uppercase.

FastAPI

from typing import [1]

class UserAdvanced([2]):
    tags: [1][str] = []

    def get_upper_username(self) -> str:
        return self.username.[3]()

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AList

BUserBase

Cupper

DOptional

Attempts:

3 left

💡 Hint

Common Mistakes

Using Optional instead of List for tags.

Not inheriting from UserBase.

Using wrong string method like 'capitalize' instead of 'upper'.

Use List from typing for a list of strings. The model inherits from UserBase. The method calls upper() to get uppercase username.