You want to fetch all users from a database asynchronously using the databases library in FastAPI. Which code snippet correctly fetches all rows and returns them as a list of dictionaries?

hard🚀 Application Q15 of 15

FastAPI - Database Integration

You want to fetch all users from a database asynchronously using the databases library in FastAPI. Which code snippet correctly fetches all rows and returns them as a list of dictionaries?

database = databases.Database('sqlite:///test.db')

async def get_users():
    query = 'SELECT * FROM users'
    # Which line correctly fetches all rows?
    ???
    return users

Ausers = await database.fetch_all(query)

Busers = database.fetch_all(query)

Cusers = await database.fetch_one(query)

Dusers = database.fetch_one(query)

Step-by-Step Solution

Solution:

Step 1: Understand fetch_all vs fetch_one
fetch_all returns all rows as a list; fetch_one returns a single row.
Step 2: Use await with async fetch_all
Since fetch_all is async, it must be awaited to get the result.
Final Answer:
users = await database.fetch_all(query) -> Option A
Quick Check:
Fetch all rows async with await = B [OK]

Quick Trick: Use await with fetch_all to get all rows asynchronously [OK]

Common Mistakes:

MISTAKES

Using fetch_one to get all rows
Forgetting await on async calls
Calling fetch_all synchronously

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You want to fetch all users from a database asynchronously using the databases library in FastAPI. Which code snippet correctly fetches all rows and returns them as a list of dictionaries?

Step 1: Understand fetch_all vs fetch_one

Step 2: Use await with async fetch_all

Final Answer:

Quick Check:

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