Including routers in main app in FastAPI - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of including routers in a FastAPI main app?

Including routers helps organize your API into smaller parts. Each router can handle related routes, making the app easier to manage and read.

beginner

How do you include a router in a FastAPI main app?

Use the include_router() method on the main FastAPI app instance, passing the router object as an argument.

intermediate

What is the benefit of using prefix when including a router?

The prefix adds a common path before all routes in that router. It helps group routes under a shared URL path, like /users.

intermediate

Can routers have their own tags and dependencies in FastAPI?

Yes, routers can have their own tags for documentation and dependencies that apply only to routes inside that router.

beginner

Example: How to include a router named user_router with prefix /users in the main app?

In your main app, write: <br>app.include_router(user_router, prefix='/users')

What method do you use to add a router to a FastAPI app?

A include_router()

B add_router()

C register_router()

D attach_router()

The correct method to add a router is include_router().

What does the prefix argument do when including a router?

A Sets a common URL path before all routes in the router

B Changes the HTTP method of all routes

C Adds authentication to the router

D Removes all routes from the router

prefix adds a shared path prefix to all routes in the router.

Can routers in FastAPI have their own dependencies?

A No, dependencies must be set only on the main app

B Only if the router has no routes

C Yes, routers can have dependencies specific to their routes

D Dependencies are not supported in routers

Routers can have their own dependencies that apply only to their routes.

Which of these is a correct way to include a router named blog_router with no prefix?

A app.include_router(blog_router)

B All of the above

C app.include_router(blog_router, prefix='/')

D app.include_router(blog_router, prefix='')

All these ways include the router without adding a prefix.

Why is it good to split routes into routers in FastAPI?

A To avoid using dependencies

B To slow down the app

C To disable documentation

D To organize code and make it easier to maintain

Splitting routes into routers helps keep code organized and easier to manage.

Explain how to include a router in a FastAPI main app and why you might want to use a prefix.

Think about grouping related routes under one URL part.

Describe the benefits of using routers in FastAPI applications.

Consider how breaking things into parts helps in real life.