[BUG] Composed properties are missing from allVars

Created by: glennschmidt

Description

When a model includes properties by composition (allOf, without a discriminator), these properties end up in the vars template variable but they are missing from the allVars variable.

I would expect allVars to include, at minimum, everything in vars. Some generators only iterate allVars when producing a model class, so they will be missing these composed properties.

openapi-generator version

4.1.0

OpenAPI declaration file content or url

https://gist.github.com/glennschmidt/d5e87fe518ac5afc7c39032ae1df479e

Command line used for generation

openapi-generator generate -i openapi.json -g swift4 -o apigen

Steps to reproduce

1. Execute the above CLI with the schema from the linked gist
2. Look at the generated output apigen/OpenAPIClient/Classes/OpenAPIs/Models/EventCollection.swift

It will contain

public struct EventCollection: Codable {


    public init() {
    }


}

ie. The EventCollection model has no properties, but it should have

• page
• page_count
• page_size
• total_items
• events

Suggest a fix

In DefaultCodegen.fromModel(), when adding composed properties to properties, also add them to allProperties (i will submit a PR with this).