[BUG][SPRING] Default value for query parameter not exported to code and doc

Created by: marikori

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

openapi: 3.0.0 Default value for query parameter not exported to code and doc.

openapi-generator version

Current, available in https://app.swaggerhub.com

OpenAPI declaration file content or url

https://app.swaggerhub.com/apis/marikori/default_value_bug/1.0.0

Command line used for generation

Use swaggerhub UI to generate documentation - Export -> Documentation -> html2:

Use swaggerhub UI to generate code - Export -> Server Stub -> spring:

Steps to reproduce

1. Define default value for parameter in OAS - line 14 (dafault = 0 for par1) in https://app.swaggerhub.com/apis/marikori/default_value_bug/1.0.0
2. Export html2 documentation using codegen available in swaggerbub (see above).
3. Export Spring server code using codegen available in swaggerbub (see above).

Results: 2. Default value not defined in exported documentation. 3. Default value not define in exported code.

exported_code_and_doc.tar.gz

Related issues/PRs

Suggest a fix