如何在 OpenAPI/Swagger 中指定字段是可选的还是必需的?

问题描述

如何在 OpenAPI/Swagger 中定义字段是可选的还是必需的，默认值是什么?

How to I define in OpenAPI/Swagger if a field is optional or required and what is the default?

推荐答案

默认情况下，模型中的字段是可选的，除非您将它们放在 required 列表中.下面是一个示例 - id、category 是可选字段，name 是必需的.请注意，required 不是字段的属性，而是对象本身的属性 - 它是必需属性的列表.

By default, fields in a model are optional unless you put them in the required list. Below is an example - id, category are optional fields, name is required. Note that required is not an attribute of fields, but an attribute of the object itself - it's a list of required properties.

type: object
required:  # List the required properties here
  - name
properties:
  id:
    type: integer
    format: int64
  category:
    $ref: '#/definitions/Category'
  name:
    type: string
    example: doggie

参考:https://github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/test/resources/2_0/petstore.yaml#L658

如果这是请求正文的模型，您可能还需要将正文本身标记为required:

If this is the model for the request body, you'll probably also need to mark the body itself as required:

# swagger: '2.0'

parameters:
  - in: body
    name: body
    required: true  # <----
    schema:
      $ref: '#/definitions/Pet'

# openapi: 3.0.1

requestBody:
  required: true  # <----
  content:
    ...

要指定可选字段的默认值，您可以使用 default 属性.下面是一个例子:

To specify the default value of optional fields, you can use the default attribute. Here is an example:

type: object
properties:
  huntingSkill:
    type: string
    description: The measured skill for hunting
    default: lazy

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