Gramps XML export fails with 'can only concatenate str (not "NoneType") to str

[EvilCartyen]

I imported a family tree-backup from the desktop version to gramps web, and now I've done a bunch of work on it (thanks for the tool!), and would like to back it up but I am met with this error when trying.

I assume I have some weird data somewhere, but I am not sure how to proceed to fix it.

[DavidMStraub]

Hi,

that error is already tracked here
gramps-project/gramps-web-api#479
so I will close this one.

But it would be great if you could help investigate.

Can you please go to the list views (people etc.), open the filter, choose GQL and try out the following filter:

media_list.any = None

for all of the object types except media and notes? Does it give any results?

Background: There is an object in your database that has a None as handle in the media list.

[EvilCartyen]

Thanks - no results, though. I restarted the container and tried again, still no result, and also same error when exporting.

My instance is public if you want to investigate :)

[DavidMStraub]

😱 public?

[EvilCartyen]

I mean, a public URL but you need an account still, of course...

[EvilCartyen]

Anyway, I would appreciate suggestions on how to proceed, I an uneasy having no backups with all the work I have been doing :)

[DavidMStraub]

Yep understood. So you need to find out which of your objects has a "None" in the media_list. Would you feel confident enough to manually query the API via command line?

https://www.grampsweb.org/dev-backend/queries/

You need to fetch the /api/people, etc. for the other object types, endpoints and check where there is a None in the media_list.

You could also employ my poorly known library https://github.com/DavidMStraub/gramps-web-api-client.

[EvilCartyen]

I finally got around to learning how to do this - sorry for being slow :) Anyway, I queries the API and retrieved:

• citations
• events
• families
• media
• notes
• people
• places
• repositories
• sources

None of them (heh) have 'None' written anywhere in the json, but maybe I am searching for the wrong thing. What exactly am I looking for? :)

[DavidMStraub]

Python None corresponds to null in JS, perhaps that?

[EvilCartyen]

All dates have a "format": null value - what exactly am I looking for?

"media_list": [
 null
],

?