OpenAPI定义中父对象非必填但子属性必填，请求时能否忽略父对象？

可以完全忽略整个MyIdentity对象，原因如下：

• 从你提供的FooData定义来看，identity字段并没有被加入required列表，这意味着调用API时，请求体里完全可以不包含这个字段，不会触发校验错误。
• MyIdentity内部的userId必填要求，只有当你主动在请求体里包含identity对象的时候才需要遵守。简单说：你要是提供了identity，就得带上userId；但你要是压根不提供identity，这个规则对你不生效。

附上你给出的OpenAPI定义：

FooData:
  type: object
  additionalProperties: false
  description: Holds the foo data Information.
  required:
    - id
    - contact
  properties:
    id:
      description: Identifier
      type: string
      maxLength: 255
      minLength: 1
      pattern: ^[a-zA-Z0-9\-]{1,255}$
    identity:
      description: Holds customer identity info.
      $ref: '#/MyIdentity'

MyIdentity:
  type: object
  additionalProperties: false
  description: Holds the customer identity information.
  required:
   - userId
  properties:
    userId:
      type: integer
      format: int64
      minimum: 0
      maximum: 9223372036854775807
      description: Unique Identification Number which is specific to individual user.

    firstName:
      type: string
      description: user's First name.
      maxLength: 32
      minLength: 1
      pattern: ^[a-zA-Z\s]{1,32}$

内容的提问来源于stack exchange，提问作者Harsh