Fix CORS configuration#49
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DanTcheche
approved these changes
Mar 21, 2026
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Problem
The
BACKEND_CORS_ORIGINSenv inconfig.pyis typed asUnion[str, List[str]]. Pydantic never parses this env as a list because it attempts to cast unions in order, and str always succeeds.Solution
Reverse the type annotation, to
Union[List[str], str]so it tries to cast to a list first.Also, correctly write the example in
.env.exampleso that it's clear how to add many domains to the allowed list.