Swagger-codegen: [Python] JSON reference in $ref isn't acknowledged

[bradj]

Description

It looks like I am having a couple issues.

1. $ref: '#/definitions/Tenant/properties/name' gets rendered in the Tenant model with type Tenantpropertiesname
2. The rendered Tenant model only has a name property. The Tenant definition below has 6 total properties which do not make it into the rendered model.
3. Replacing $ref: '#/definitions/Tenant/properties/name' with a simple type: string fixes the type issue but still leaves a relatively empty Template model.

@property
    def name(self):
        """
        Gets the name of this Tenant.

        :return: The name of this Tenant.
        :rtype: Tenantpropertiesname
        """
        return self._name

Swagger-codegen version

2.2.3

Swagger declaration file content or url

patch:
      description: Update a tenant record.
      operationId: update
      tags:
      - tenants
      parameters:
      - $ref: "#/parameters/id"
      - in: body
        name: tenant
        description: The tenant properties to update
        schema:
          type: object
          required:
            - name
          properties:
            name:
              $ref: '#/definitions/Tenant/properties/name'

Tenant:
    type: object
    required:
      - name
      - handle
    properties:
      id:
        type: integer
        format: int32
        readOnly: true
      name:
        type: string
      handle:
        type: string
        pattern: '^[a-zA-Z0-9-]{0,62}$'
      createdAt:
        type: string
        format: date-time
        readOnly: true
      updatedAt:
        type: string
        format: date-time
        readOnly: true
      deletedAt:
        type: string
        format: date-time
        readOnly: true

Command line used for generation

swagger-codegen generate --input-spec fetched/tenant-service.yaml --lang python --output sdk

Steps to reproduce

Related issues/PRs

I am not able to find a related issue.

Suggest a fix/enhancement

Unsure.

[wing328]

          $ref: '#/definitions/Tenant/properties/name'

I don't think you can do that. You can only reference a model not a specified property of a model.

[bradj]

@wing328 Then shouldn't swagger-codegen fail on validation if this is not valid?

[slushie]

@wing328 That's not a requirement in the spec. In fact, the spec says:

The Reference Object is a JSON Reference that uses a JSON Pointer as its value. For this specification, only canonical dereferencing is supported.

The { $ref: "#/some/deeply/nested/object" } syntax is perfectly valid syntax according to the JSON reference RFC.

In addition to the _de rigueur_ definition in the spec, the _de facto_ standards enforced by swagger-codegen validate and other official and non-official tooling all point to deep JSON pointers as valid references.

This issue should be re-opened. The point of a formal specification is to remove the ambiguity caused by assuming "I don't think you can do that."

[wing328]

Just reopened it. Please open an issue in the Swagger Parser project to report this.

[wing328]

Please workaround the problem for the time being by specifying the property type directly instead of using $ref.