不允许的附加属性：可为 null 的 swagger

我正在使用 swagger 2.0 和 Node.js Express 4.12.3 和 mysql db。

我创建了以下架构 -

  Country:
    type: "object"
    properties:
      id:
        type: "integer"
        readOnly: true
        description: "Country Id"
      country:
        type: "string"
        description: "Country name"
      created_at:
        type: "string"
        readOnly: true
        format: "date-time"
        description: "Country record creation date"
      deleted_at:
        type: "string"
        format: "date-time"
        description: "Country record delete date"
    required:
      - country

这里的deleted_at字段将为空，并且在记录被删除之前不会出现在数据库中。 我的基于 Express 的 Nodejs 服务器返回日期如下 -

[{“id”：4，“国家”：“g”，“created_at”：“2018-01-29T04：51：46.0​​00Z”，“deleted_at”：null}，{“id”：5，“国家” :"gaaaf","created_at":"2018-01-29T04:54:59.000Z","deleted_at":null},{"id":6,"country":"abcd","created_at":"2018 -01-29T04:57:02.000Z","deleted_at":null}]

当我尝试通过 swagger-ui 进行休息呼叫时，出现以下错误 -

"message":"Response validation failed: failed schema

validation","code":"SCHEMA_VALIDATION_FAILED","failedValidation":true,
{"errors":[{"code":"INVALID_TYPE","message":"Expected type string but found type null","path":["5","deleted_at"],"description":"Country record delete date"},

阅读文档后，我做了以下操作-

  deleted_at:
    type: "string"
    format: "date-time"
    nullable: true
    description: "Country record delete date"

然后我开始在 swagger-ui 中收到此验证错误

消息：“不允许使用其他属性：可以为空”

我尝试将类型设置为字符串对象，但即使这样也不起作用。

 deleted_at:
        type: "object"
        format: "date-time"
        nullable: true
        description: "Country record delete date"

OpenAPI/Swagger 2.0不允许 可为空值对于任何类型。nullable: true在 OpenAPI 3.0 中引入，在 OpenAPI/Swagger 2.0 中不支持。

解决方法是不发送deleted_at如果它应该是null.