问题
Is there a generator to convert openapi 3.0 to swagger 2.0?
Mashery, an API gateway, requires swagger 2.0 format on input to open endpoint.
回答1:
LucyBot api-spec-converter (online version, GitHub repo, Node.js module) can convert from OpenAPI 3.0 to 2.0.
API Transformer also claims to be able to convert OpenAPI 3.0 back to OpenAPI 2.0. There's a command-line version too.
Keep in mind that OAS3→OAS2 convertion is lossy in general, because OAS3 has features that did not exist in OAS2 (such as multiple servers, oneOf/anyOf, different schemas per media type, objects in query string parameters, cookie parameters, and others).
来源：https://stackoverflow.com/questions/56637299/convert-openapi-3-0-to-swagger-2-0