Method _make_metadata

src/flask_sqlalchemy/extension.py:450–475

Get or create a :class:`sqlalchemy.schema.MetaData` for the given bind key. This method is used for internal setup. Its signature may change at any time. :meta private: :param bind_key: The name of the metadata being created. .. versionadded:: 3.0

(self, bind_key: str | None)

        self.session.remove()

    def _make_metadata(self, bind_key: str | None) -> sa.MetaData:
        """Get or create a :class:`sqlalchemy.schema.MetaData` for the given bind key.

        This method is used for internal setup. Its signature may change at any time.

        :meta private:

        :param bind_key: The name of the metadata being created.

        .. versionadded:: 3.0
        """
        if bind_key in self.metadatas:
            return self.metadatas[bind_key]

        if bind_key is not None:
            # Copy the naming convention from the default metadata.
            naming_convention = self._make_metadata(None).naming_convention
        else:
            naming_convention = None

        # Set the bind key in info to be used by session.get_bind.
        metadata = sa.MetaData(
            naming_convention=naming_convention, info={"bind_key": bind_key}
        )
        self.metadatas[bind_key] = metadata
        return metadata

    def _make_table_class(self) -> type[_Table]:
        """Create a SQLAlchemy :class:`sqlalchemy.schema.Table` class that chooses a