Flask extensions directory - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Flask extension for database handling.

Flask

from flask_sqlalchemy import [1]

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

AFlask

BApp

CDatabase

DSQLAlchemy

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to import 'Flask' instead of the extension class.

Using 'Database' which is not the correct class name.

The Flask extension for database handling is called SQLAlchemy. You import it from flask_sqlalchemy.

2fill in blank

medium

Complete the code to initialize the Flask-Mail extension in your app.

Flask

from flask_mail import Mail
mail = [1]()

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

AFlaskMail

BMailApp

CMail

DMailExtension

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'FlaskMail' which is not the correct class name.

Trying to instantiate 'MailExtension' which does not exist.

The Flask-Mail extension provides the Mail class to create a mail instance.

3fill in blank

hard

Fix the error in the code to correctly register the Flask-Login extension.

Flask

from flask_login import LoginManager
login_manager = LoginManager()
login_manager.[1](app)

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

Ainit_app

Bstart_app

Cregister

Dsetup

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start_app' which is not a method.

Using 'register' or 'setup' which are incorrect.

The correct method to initialize Flask extensions with the app is init_app.

4fill in blank

hard

Fill both blanks to create a Flask-WTF form class with a submit button.

Flask

from flask_wtf import FlaskForm
from wtforms import [1]

class MyForm(FlaskForm):
    submit = [2]('Submit')

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

ASubmitField

BStringField

DBooleanField

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'StringField' but using 'BooleanField' for submit.

Using 'SubmitField' in import but not in the class.

You import SubmitField from wtforms to create a submit button. The first blank is the import of SubmitField, and the second blank is the use of SubmitField to create the button.

5fill in blank

hard

Fill all three blanks to create a Flask-Migrate migration setup.

Flask

from flask_migrate import [1]
migrate = [2]()
migrate.[3](app, db)

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

AMigrate

Cinit_app

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' instead of 'init_app'.

Confusing the class name with the method name.

Flask-Migrate uses the Migrate class. You create an instance of it, then call init_app to connect it to your Flask app and database.