Override SWAGGER_UI_SETTINGS via custom_settings

[stefanofusai]

I'm looking for a way to override SWAGGER_UI_SETTINGS for a given SpectacularSwaggerView as I want to serve different schemas for admins and customers.

My urls.py look like this:

urlpatterns = [
    ...
    path("docs/", SpectacularSwaggerView.as_view(url_name="v4-schema"), name="docs"),
    path(
        "docs/customers/",
        SpectacularSwaggerView.as_view(url_name="v4-customers-schema"),
        name="customers-docs",
    ),
    path(
        "schema/v3/",
        SpectacularAPIView.as_view(
            api_version="v3", custom_settings={"VERSION": "3.0.0"}
        ),
        name="v3-schema",
    ),
    path(
        "schema/v4/",
        SpectacularAPIView.as_view(
            api_version="v4", custom_settings={"VERSION": "4.0.0"}
        ),
        name="v4-schema",
    ),
    path(
        "schema/customers/v3/",
        SpectacularAPIView.as_view(
            api_version="v3",
            custom_settings={
                "APPEND_COMPONENTS": {
                    "securitySchemes": {
                        "ApiKeyAuth": {
                            "type": "apiKey",
                            "in": "header",
                            "name": "X-API-Key",
                        }
                    }
                },
                "AUTHENTICATION_WHITELIST": ["src.customers.permissions.HasAPIKey"],
                "SCHEMA_PATH_PREFIX": r"^(/customers/v3/)$",
                "VERSION": "3.0.0",
            },
            serve_public=False, # Customer will need to Authorize in the UI via API Key
        ),
        name="v3-customers-schema",
    ),
    path(
        "schema/customers/v4/",
        SpectacularAPIView.as_view(
            api_version="v4",
            custom_settings={
                "APPEND_COMPONENTS": {
                    "securitySchemes": {
                        "ApiKeyAuth": {
                            "type": "apiKey",
                            "in": "header",
                            "name": "X-API-Key",
                        }
                    }
                },
                "AUTHENTICATION_WHITELIST": ["src.customers.permissions.HasAPIKey"],
                "SCHEMA_PATH_PREFIX": r"^(/customers/v3/)$",
                "VERSION": "4.0.0",
            },
            serve_public=False, # Customer will need to Authorize in the UI via API Key
        ),
        name="v4-customers-schema",
    )
]

And my SPECTACULAR_SETTINGS look like this:

SPECTACULAR_SETTINGS = {
    ...,
    "SERVE_INCLUDE_SCHEMA": False,
    "SWAGGER_UI_SETTINGS": """{
        defaultModelsExpandDepth: -1,
        deepLinking: true,
        displayRequestDuration: true,
        layout: "StandaloneLayout",
        persistAuthorization: true,
        presets: [SwaggerUIBundle.presets.apis, SwaggerUIStandalonePreset],
        requestSnippetsEnabled: true,
        tagsSorter: "alpha",
        urls: [{url: "/schema/v4/", name: "v4"}, {url: "/schema/v3/", name: "v3"}],
        validatorUrl: null
    }""",
	...
}

The issue that I'm encountering is that due to my API having versioning enabled via SWAGGER_UI_SETTINGS.urls I have no way of overriding the schema urls for the customers-docs view as it will always point to urls: [{url: "/schema/v4/", name: "v4"}, {url: "/schema/v3/", name: "v3"}].
My goal is to somehow set urls: [{url: "/schema/customers/v4/", name: "v4"}, {url: "/schema/customers/v3/", name: "v3"}] for the customers-docs view, but that doesn't seem to be possible via custom_settings.

Am I missing something? Is there a better way to achieve what I'm trying to achieve?
Thanks for the help!