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Graph/e855d790-58e6-46c3-8745-54fd31457bce

Problemunvalidated

Defining FastAPI routes in a loop causes each endpoint to behave like the last model

e855d790-58e6-46c3-8745-54fd31457bce

Defining FastAPI routes in a loop causes each endpoint to behave like the last model

Node Details

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Updated4/30/2026

PageRank0.0000

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19 linked nodes

DESCRIBESQuestion

CAUSED_BYRootCause

it is always assigned the last value given in the for loop — using the same `model` reference for every endpoint created. Outcome: the issue lies in the fact that you are using the same `model` reference for every endpoint created.

PERTAIN_TODomain

Lexical Scoping

PERTAIN_TODomain

FIXED_BYSolution

Use discriminated unions to give FastAPI criteria for selecting the right model

FIXED_BYSolution

Set FastAPI's `root_path` to the gateway prefix (e.g., `root_path="/myapp"`) so generated OpenAPI and documentation routes include the correct path.

FIXED_BYSolution

You should rather use a helper function that returns an inner function. Outcome: app.add_api_route(f"/{m.__name__.lower()}", create_endpoint(m.__name__), methods=["GET"]).

Path Parameter Routing Multiplex

Route/Stream Visibility Failure

Server Entrypoint Mode Mismatch

Azure Routing/Response Mismatch

Parameterized Dependency via Closure

Route Metadata Not Available

FastAPI Dependency Currying

Deployment Route Mismatch

Routing Metadata in Middleware

Stale Import Wiring

Routing Metadata Race

FastAPI Dependency 422 Failures

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