[Solved] You have this server code snippet handling updates:if resource.version != client_version: return Response(status=409, body={"error": "Version mismatch"}) else:... | Rest API

Rest API - HTTP Status Codes

You have this server code snippet handling updates:

if resource.version != client_version:
    return Response(status=409, body={"error": "Version mismatch"})
else:
    update_resource()

But clients report they get 409 even when no conflict exists. What is the likely bug?

AClients are sending wrong HTTP methods.

BThe update_resource() function is missing.

CThe server should return 404 instead of 409.

DThe server is not comparing versions correctly; types may differ causing mismatch.

Step-by-Step Solution

Solution:

Step 1: Analyze version comparison logic
If types differ (e.g., string vs int), equality check fails causing false conflicts.
Step 2: Identify likely cause of false 409
Incorrect type comparison leads to always triggering 409 even if versions match logically.
Final Answer:
The server is not comparing versions correctly; types may differ causing mismatch. -> Option D
Quick Check:
Type mismatch in version check causes false 409 [OK]

Quick Trick: Check data types when comparing versions to avoid false conflicts [OK]

Common Mistakes:

MISTAKES

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