Let's say you have a Pydantic model with default values, like this one:

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:7] hl[7] *}

### Model for Input { #model-for-input }

If you use this model as an input like here:

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:15] hl[14] *}

...then the `description` field will **not be required**. Because it has a default value of `None`.

The exit code, the automatic closing of the `Session` in:

{* ../../docs_src/dependencies/tutorial013_an_py310.py ln[19:21] *}

...would be run after the response finishes sending the slow data:

{* ../../docs_src/dependencies/tutorial013_an_py310.py ln[30:38] hl[31:33] *}

BASE="$1"
find "${BASE}" -type l | \
  while read l ; do
    if [[ "$(readlink "$l")" == /lib* ]]; then
      ORIG="$(readlink "$l")";
      rm "$l";
      ln -s "${BASE}${ORIG}" "$l"
    fi

          sudo chown -R jenkins /mnt/secret
          cp -r "$WORKSPACE" /mnt/secret
          cd /mnt/secret/$(basename "$WORKSPACE")
          touch .output.log
          rm -Rf "$WORKSPACE"
          ln -s "$PWD" "$WORKSPACE"
      - shell: |
          #!/usr/local/bin/runbld --redirect-stderr

假設你有一個帶有預設值的 Pydantic 模型，如下所示：

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:7] hl[7] *}

### 輸入用模型 { #model-for-input }

如果你把這個模型用作輸入，如下所示：

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:15] hl[14] *}

...則 `description` 欄位將不是必填。因為它的預設值是 `None`。

### 文件中的輸入模型 { #input-model-in-docs }

你可以在文件中確認，`description` 欄位沒有紅色星號，表示不是必填：

假设你有一个带有默认值的 Pydantic 模型，例如：

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:7] hl[7] *}

### 输入用的模型 { #model-for-input }

如果你像下面这样把该模型用作输入：

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:15] hl[14] *}

...那么 `description` 字段将**不是必填项**，因为它的默认值是 `None`。

### 文档中的输入模型 { #input-model-in-docs }

## 기본 Swagger UI 매개변수 변경 { #change-default-swagger-ui-parameters }

FastAPI는 대부분의 사용 사례에 적합한 몇 가지 기본 구성 매개변수를 포함하고 있습니다.

기본 구성에는 다음이 포함됩니다:

{* ../../fastapi/openapi/docs.py ln[9:24] hl[18:24] *}

`swagger_ui_parameters` 인수에 다른 값을 설정하여 이러한 기본값 중 어느 것이든 재정의할 수 있습니다.

예를 들어, `deepLinking`을 비활성화하려면 `swagger_ui_parameters`에 다음 설정을 전달할 수 있습니다:

SUDOERS_VARS
sudo chmod 0440 /etc/sudoers.d/elasticsearch_vars

# Bats tests still use this locationa
sudo rm -Rf /elasticsearch
sudo mkdir -p /elasticsearch/qa/ && sudo chown jenkins /elasticsearch/qa/ && ln -s $PWD/qa/vagrant /elasticsearch/qa/

# sudo sets it's own PATH thus we use env to override that and call sudo annother time so we keep the secure root PATH
# run with --continue to run both bats and java tests even if one fails

這個設定會變更語法醒目提示的配色主題：

<img src="/img/tutorial/extending-openapi/image04.png">

## 更改預設的 Swagger UI 參數 { #change-default-swagger-ui-parameters }

FastAPI 內建一些預設參數，適用於大多數情境。

包含以下預設設定：

{* ../../fastapi/openapi/docs.py ln[9:24] hl[18:24] *}

你可以在 `swagger_ui_parameters` 參數中提供不同的值來覆蓋其中任一項。

例如，要停用 `deepLinking`，可以在 `swagger_ui_parameters` 傳入以下設定：

{* ../../docs_src/configure_swagger_ui/tutorial003_py310.py hl[3] *}

FastAPI includes some default configuration parameters appropriate for most of the use cases.

It includes these default configurations:

{* ../../fastapi/openapi/docs.py ln[9:24] hl[18:24] *}

You can override any of them by setting a different value in the argument `swagger_ui_parameters`.

For example, to disable `deepLinking` you could pass these settings to `swagger_ui_parameters`: