Swagger 招摇过市模式不适用于招摇过市UI

我正在用swagger制作一个API，并试图更新YAML，以便将regex模式需求添加到参数中。目前，我正在尝试以下方法：

# getCPIStatesForCountry endpoint
  /getCPIStatesForCountry:
    # This is a HTTP operation
    get:
      # Describe this verb here. Note: you can use markdown
      description: |
        Returns a list of states for a given country
      produces:
      - application/json
      # This is array of GET operation parameters:
      parameters:
        -
          name: country_code
          in: query
          description: Code of desired country
          required: true
          type: string
          pattern: "^[a-zA-Z]+$"

---

然而，Swagger UI允许我输入任何内容作为有效输入。为什么会这样

Swagger UI 3.4.3及更高版本支持对模式进行参数验证