I've created a Groovy script to convert from "OpenAPI" specification (aka Swagger file) to "JSON Schema".
https://github.com/adzubla/schema-convert
groovy SchemaConvert.groovy openapi-spec.yaml
You can add the -m option to generate a schema compatible with MongoDB.
groovy SchemaConvert.groovy openapi-spec.yaml -m
Sample execution
groovy SchemaConvert.groovy petstore.yaml
Input file petstore.yaml:
openapi: "3.0.0"
info:
version: 1.0.0
title: Swagger Petstore
license:
name: MIT
servers:
- url: http://petstore.swagger.io/v1
paths:
/pets:
get:
summary: List all pets
operationId: listPets
tags:
- pets
parameters:
- name: limit
in: query
description: How many items to return at one time (max 100)
required: false
schema:
type: integer
format: int32
responses:
'200':
description: A paged array of pets
headers:
x-next:
description: A link to the next page of responses
schema:
type: string
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
post:
summary: Create a pet
operationId: createPets
tags:
- pets
responses:
'201':
description: Null response
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
/pets/{petId}:
get:
summary: Info for a specific pet
operationId: showPetById
tags:
- pets
parameters:
- name: petId
in: path
required: true
description: The id of the pet to retrieve
schema:
type: string
responses:
'200':
description: Expected response to a valid request
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
components:
schemas:
Pets:
type: array
items:
$ref: "#/components/schemas/Pet"
Pet:
required:
- id
- name
properties:
id:
type: integer
format: int64
name:
type: string
tag:
type: string
Error:
required:
- code
- message
properties:
code:
type: integer
format: int32
message:
type: string
Output file petstore.json:
{"key": "value"}
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