[BUG] [Typescript] Missing type

[Eywek]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?

Description

See examples below

openapi-generator version

From v4.3.0 to 5.0.0-SNAPSHOT

OpenAPI declaration file content or url

openapi: 3.0.0
info:
    title: datasources-v2-frontend
    version: 0.0.0
paths:
    '/{id}':
        patch:
            parameters:
                -
                    name: id
                    in: path
                    schema:
                        type: string
                    required: true
            responses:
                '200':
                    description: Ok
                    content:
                        application/json:
                            schema:
                                type: object
                                properties:
                                    data: {type: object, properties: {}}
                                required:
                                    - data
            tags:
                - Datasource
            requestBody:
                required: true
                content:
                    application/json:
                        schema:
                            $ref: '#/components/schemas/Partial_WorkerDatasourceVersion__'
            operationId: update-datasource
components:
    schemas:
        ApiOptions_:
            type: object
            properties:
                oauth:
                    type: string
                method:
                    oneOf:
                        -
                            type: string
                            enum:
                                - GET
                        -
                            type: string
                            enum:
                                - PATCH
                        -
                            type: string
                            enum:
                                - POST
                        -
                            type: string
                            enum:
                                - PUT
                body:
                    type: string
                headers:
                    type: object
                    properties: {}
                    additionalProperties:
                        type: string
                query:
                    type: object
                    properties: {}
                    additionalProperties:
                        type: string
                pagination:
                    oneOf:
                        -
                            type: object
                            properties:
                                type:
                                    type: string
                                    enum: [query]
                                value:
                                    type: string
                            required:
                                - type
                                - value
                        -
                            type: object
                            properties:
                                type:
                                    type: string
                                    enum: [hypermediaAttribute]
                                value:
                                    type: string
                            required:
                                - type
                                - value
        ApiOptions:
            $ref: '#/components/schemas/ApiOptions_'
        Partial_WorkerDatasourceVersion__:
            type: object
            properties:
                companyId:
                    type: string
                resourceGroupIds:
                    type: array
                    items:
                        type: string
                name:
                    type: string
                apiOptions:
                    $ref: '#/components/schemas/ApiOptions'

Generation Details

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli:v4.3.0 generate \
            --additional-properties=useSingleRequestParameter=true,enumPropertyNaming=UPPERCASE \
            -i /local/swagger.yaml \
            -g typescript-axios \
            -o /local/client

Generated typescript:

/**
 * 
 * @export
 * @interface PartialWorkerDatasourceVersion
 */
export interface PartialWorkerDatasourceVersion {
    /**
     * 
     * @type {string}
     * @memberof PartialWorkerDatasourceVersion
     */
    companyId?: string;
    /**
     * 
     * @type {Array<string>}
     * @memberof PartialWorkerDatasourceVersion
     */
    resourceGroupIds?: Array<string>;
    /**
     * 
     * @type {string}
     * @memberof PartialWorkerDatasourceVersion
     */
    name?: string;
    /**
     * 
     * @type {ApiOptions}
     * @memberof PartialWorkerDatasourceVersion
     */
    apiOptions?: ApiOptions;
}

The type ApiOptions is never defined. Probably because the ApiOptions ref to ApiOptions with an underscore and the underscore gets removed by the generator leading to this bug.