You want to add a new service method create_user that saves a user and returns the new user ID. Which approach best follows the service layer pattern in Flask?

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Flask - Ecosystem and Patterns

You want to add a new service method create_user that saves a user and returns the new user ID. Which approach best follows the service layer pattern in Flask?

AAdd create_user method in service class and call it from route

BWrite database code directly in the route

CPut user creation logic in app initialization

DUse global variable in route without service

Step-by-Step Solution

Solution:

Step 1: Recall service layer purpose
The service layer should contain business logic like user creation, keeping routes simple and clean.
Step 2: Evaluate options
Add create_user method in service class and call it from route correctly adds create_user to the service class and calls it from the route, following the pattern.
Final Answer:
Add create_user method in service class and call it from route -> Option A
Quick Check:
Business logic in service, routes call service [OK]

Quick Trick: Put business logic in service, call from routes [OK]

Common Mistakes:

MISTAKES

Putting logic directly in routes
Using global variables instead of service
Placing logic in app initialization

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You want to add a new service method create_user that saves a user and returns the new user ID. Which approach best follows the service layer pattern in Flask?

Step 1: Recall service layer purpose

Step 2: Evaluate options

Final Answer:

Quick Check:

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