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docs/en/docs/tutorial/query-params-str-validations.md
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@ -276,9 +276,13 @@ In other words, `None` is not an acceptable runtime value for query parameters
If you want to accept special values (like `"None"` or an empty string) and interpret them as `None` in your application, you can handle them manually in your function:
{* ../../docs_src/query_params_str_validations/tutorial006d_an_py310.py hl[9,11] *}
{* ../../docs_src/query_params_str_validations/tutorial006d_an_py310.py hl[9:13 18] *}
> **Note**: This example uses `BeforeValidator`, which is only available in **Pydantic v2**.
/// note
This example uses `BeforeValidator`, which is only available in **Pydantic v2**.
///
## Query parameter list / multiple values { #query-parameter-list-multiple-values }