chroma-core/chroma · error · KeyError

No such key: {key}, valid keys are: {self.get_model_fields()

Error message

No such key: {key}, valid keys are: {self.get_model_fields()}

What it means

Error "No such key: {key}, valid keys are: {self.get_model_fields()}" thrown in chroma-core/chroma.

Source

Thrown at chromadb/types.py:136

    def __getitem__(self, key: str) -> Optional[Any]:
        """Allows the collection to be treated as a dictionary"""
        if key == "configuration":
            return self.get_configuration()
        # For the other model attributes we allow the user to access them directly
        if key in self.get_model_fields():
            return getattr(self, key)
        return None

    # TODO: This doesn't check types.
    def __setitem__(self, key: str, value: Any) -> None:
        """Allows the collection to be treated as a dictionary"""
        # For the model attributes we allow the user to access them directly
        if key == "configuration":
            self.set_configuration(value)
        if key in self.get_model_fields():
            setattr(self, key, value)
        else:
            raise KeyError(
                f"No such key: {key}, valid keys are: {self.get_model_fields()}"
            )

    def __eq__(self, __value: object) -> bool:
        # Check that all the model fields are equal
        if not isinstance(__value, Collection):
            return False
        for field in self.get_model_fields():
            if getattr(self, field) != getattr(__value, field):
                return False
        return True

    def get_configuration(self) -> CollectionConfiguration:
        """Returns the configuration of the collection"""
        try:
            return load_collection_configuration_from_json(self.configuration_json)
        except Exception as e:
            raise ValueError(

View on GitHub (pinned to aecdd12c8a)

When it happens

Trigger: Thrown at chromadb/types.py:136 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of chroma-core/chroma@aecdd12c8a (2026-08-16). Data as JSON: /api/errors/a5f40b6648704a17. Report an issue: GitHub.