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from __future__ import annotations

[docs]def bq_cast(string_field: str, bq_type: str) -> None | int | float | bool | str: """ Helper method that casts a BigQuery row to the appropriate data types. This is useful because BigQuery returns all fields as strings. """ if string_field is None: return None elif bq_type == "INTEGER": return int(string_field) elif bq_type in ("FLOAT", "TIMESTAMP"): return float(string_field) elif bq_type == "BOOLEAN": if string_field not in ["true", "false"]: raise ValueError(f"{string_field} must have value 'true' or 'false'") return string_field == "true" else: return string_field

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