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warn instead of raise for missing env file - #2485
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Kludex
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Feb 6, 2024
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Thanks. |
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Thanks & sorry for the churn. |
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@Kludex Could you pls release the fixed version asap? (maybe even backport to 0.36.x releases, since it's used by latest FastsAPI v0.109.2) |
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v0.36.0 to v0.37.0 had a regression failing on missing .env file. Fixed in v0.37.1: Kludex/starlette#2485
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Starlette 0.37 modifies the exception handling behavior of the `Config` class used for application settings. The `Config` class accepts an `env_file` arg that can be used to load environment variables from a "dotenv" (`.env`) file. Previously, if the file was not found, the `Config` class would silently pass without any exception. In 0.36, the `Config` class was updated to raise a `FileNotFoundError` exception if `env_file` was not not found. This was a breaking change but was not documented as such (Kludex/starlette#2422, Kludex/starlette#2446). In 0.37, the exception handling behavior has been changed again to raise a warning instead of an exception (Kludex/starlette#2485), which could also be a breaking change if users had rewritten their code to catch the `FileNotFoundError`. This commit will update the comparisons docs to explain that a warning will now be raised, and will link to the relevant code changes.
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This commit will update/upgrade to [FastAPI 0.110.1](https://fastapi.tiangolo.com/release-notes/) and [Starlette 0.37.2](https://www.starlette.io/release-notes/). FastAPI 0.110 makes a change to dependencies with `yield` and `except`. Dependencies must now raise exceptions after `except`. This change is intended to address memory leak issues and may be a breaking change in some projects if dependencies with `yield` and `except` used `pass` instead of `raise`. See the [FastAPI docs](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-with-yield/) for further info. FastAPI 0.110.1 makes a small type annotation change to the `Depends` dependency class. Starlette 0.37 modifies the exception handling behavior of the `Config` class used for application settings. The `Config` class accepts an `env_file` arg that can be used to load environment variables from a "dotenv" (`.env`) file. Previously, if the file was not found, the `Config` class would silently pass without any exception. In 0.36, the `Config` class was updated to raise a `FileNotFoundError` exception if `env_file` was not not found. This was a breaking change but was not documented as such (Kludex/starlette#2422, Kludex/starlette#2446). In 0.37, the exception handling behavior has been changed again to raise a warning instead of an exception (Kludex/starlette#2485), which could also be a breaking change if users had rewritten their code to catch the `FileNotFoundError`. See the [fastenv docs](https://fastenv.bws.bio/comparisons#starlette) for a detailed description of the Starlette `Config` class. Note that FastAPI updated the Starlette minor version from 0.36 to 0.37 in the 0.110.1 patch release.
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Summary
Adresses #2422
Let me know if you want a custom Warning and/ or any doc changes.
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