[BUG] Failed to Read a $ref If both allOf and properties are Defined

[ChihweiLHBird]

openapi: 3.0.1
info:
  version: 4.176.0
  title: Linode API
servers:
- url: https://api.linode.com/v4
paths:
  /networking/firewalls/{firewallId}/rules:
    parameters:
      - name: firewallId
        in: path
        required: true
        schema:
          type: integer
    put:
      tags:
      - Networking
      summary: Firewall Rules Update
      operationId: updateFirewallRules
      requestBody:
        content:
          application/json:
            schema:
              allOf:
              - $ref: '#/components/schemas/Firewall/properties/rules'
              type: object
              properties:
                inbound:
                  type: array
                  items:
                    $ref: '#/components/schemas/FirewallRuleConfig'
                outbound:
                  type: array
                  items:
                    $ref: '#/components/schemas/FirewallRuleConfig'
      responses:
        '200':
          description: Firewall Rules updated successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Firewall/properties/rules'
components:
  schemas:
    Firewall:
      type: object
      properties:
        id:
          type: integer
          readOnly: true
        rules:
          type: object
          properties:
            inbound:
              type: array
              items:
                $ref: '#/components/schemas/FirewallRuleConfig'
            outbound:
              type: array
              items:
                $ref: '#/components/schemas/FirewallRuleConfig'
    FirewallRuleConfig:
      type: object
      properties:
        protocol:
          type: string

It failed to read /components/schemas/Firewall/properties/rules and generated an undefined type in Go generator.

[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules
[main] ERROR o.o.codegen.utils.ModelUtils - Failed to obtain schema from rules

[wing328]

please enable the openapi normalizer rule REFACTOR_ALLOF_WITH_PROPERTIES_ONLY: https://github.com/openapitools/openapi-generator/blob/master/docs/customization.md#openapi-normalizer

(in the future, we will default this option/rule to true)

[ChihweiLHBird]

@wing328 It works, thank you so much! I am closing this issue now.