Menu does not return preview content

[metaforx]

When querying a menu as an authenticated CMS user with the 'preview' flag enabled, only the currently public menu is returned, not the 'draft' state of the menu.

Reproduction

1. Create a menu with all nodes published
2. Change a menu title via settings in page tree (create a new draft)

Setup

• djangocms-rest@latest (0.8.1)
• djangcms 5.0.3

Result
JSON response from the API does not reflect changes.

Expected Result
JSON reflects changes. The title for the node has changed.

curl -X 'GET' \
  'http://localhost:8080/api/cms/de/menu/1/3/999/999/?preview=false' \ #?preview=true 
  -H 'accept: application/json'

[fsbraun]

Yes, that's correct. Let me look into this.

[metaforx]

@fsbraun It might be cache-related on the frontend call. I will check it also in production. If you like to fire some requests, this would be helpful, but it might be that the culprit is not on the backend.

[metaforx]

@fsbraun: I prematurely merged #70.

self.request.toolbar.preview_mode_active = preview_mode

  File "/Users/WIM/code/govos-bubikon-backend/djangocms_rest/views_base.py", line 72, in _preview_requested
    self.request.toolbar.preview_mode_active = preview_mode
    ^^^^^^^^^^^^^^^^^^^^

This breaks requests to OpenAPI for me

http://0.0.0.0:8080/api/docs/

toolbar is not present for requests outside CMS which is expected. Or is there another reason?

[metaforx]

@fsbraun

    def _preview_requested(self):
        preview_mode = "preview" in self.request.GET and self.request.GET.get("preview", "").lower() not in (
            "0",
            "false",
        )
       
        toolbar = getattr(self.request, "toolbar", None)
        if toolbar is not None:
            toolbar.preview_mode_active = preview_mode
        return preview_mode

that way we can use preview_mode, but not in docs, how can we handle this?