Fix #3807: matching characters in nested env delimeter and env prefix #3975
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pydantic/env_settings.py
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| @@ -228,7 +234,8 @@ def explode_env_vars(self, field: ModelField, env_vars: Mapping[str, Optional[st | |||
| for env_name, env_val in env_vars.items(): | |||
| if not any(env_name.startswith(prefix) for prefix in prefixes): | |||
| continue | |||
| _, *keys, last_key = env_name.split(self.env_nested_delimiter) | |||
| env_name_without_prefix = env_name[len(self.env_prefix) :] | |||
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can you add a comment here explaining why we're doing this?
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Sure. We are splitting an environment variable key into keys and last_key by self.env_nested_delimiter and in case of matching characters in both self.env_nested_delimiter and self.env_prefix, we were adding to keys an environment variable prefix. This was before, but now we just strip a prefix and can safely split by a delimeter because there will be no any more conflicts.
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No, when I say "please add a comment", I mean add a comment in the code. I know why we're doing this, but we comment the code to make it easier for someone reading this in future (including me when I've forgotten this conversation).
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Got it, sorry for misunderstanding
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please update. |
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please review. @arsenron please use the workflow explained in the PR template to assign PRs for review in future. |
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assigned hramezani, PrettyWood and samuelcolvin and unassigned arsenron
Change Summary
Hi! It is my first pull request to the project which I really, really appreciate :) The problem is when characters in
env_prefixandenv_nested_delimitermatch, it occurs an unexpected behaviour as the initial splitting was wrong in this case.I added a new
env_prefixfield toEnvSettingsSourceto fix the issue without parsingModelFieldwhich I think can create a little "code mess".Related issue number
fix #3807
Checklist
changes/<pull request or issue id>-<github username>.mdfile added describing change(see changes/README.md for details)