[Solved] Identify the error in this FastAPI role check dependency: def check_admin(user: User = Depends(get_current_user)): if user.role == 'admin': return True else: return False @app.... | FastAPI

FastAPI - Authentication and Security

Identify the error in this FastAPI role check dependency:

def check_admin(user: User = Depends(get_current_user)):
    if user.role == 'admin':
        return True
    else:
        return False

@app.get('/admin')
async def admin_panel(is_admin: bool = Depends(check_admin)):
    if not is_admin:
        raise HTTPException(status_code=403)
    return {"msg": "Welcome admin"}

ADependency should raise HTTPException directly, not return bool

BDepends should not be used inside dependency functions

CThe endpoint should not check is_admin, dependency handles it

DThe function should return user object, not bool

Step-by-Step Solution

Solution:

Step 1: Analyze dependency behavior
check_admin returns True/False instead of raising HTTPException on failure.
Step 2: Understand best practice for RBAC in FastAPI
Dependencies should raise HTTPException to stop execution early, not return bool flags.
Final Answer:
Dependency should raise HTTPException directly, not return bool -> Option A
Quick Check:
Raise exception in dependency, don't return bool [OK]

Quick Trick: Raise HTTPException in dependency to block access immediately [OK]

Common Mistakes:

MISTAKES

Returning bool instead of raising exception
Not stopping request early in dependency
Misusing Depends inside dependencies

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Identify the error in this FastAPI role check dependency:

Step 1: Analyze dependency behavior

Step 2: Understand best practice for RBAC in FastAPI

Final Answer:

Quick Check:

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