For search/index analyzer, if [doc.json](https://github.com/codelibs/fess/blob/master/src/main/resources/fess_indices/fess/doc.json) contains lang\_[lang] for your language, please modify the analyzer for your language. For more details about Analyzers, see the [Elasticsearch documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-analyzers.html).

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union