Get field of json - can't figure out json-path

[webwurm]

I have a problem that I just can't figure out - so I hope the crowd can help me.

I have a field, called "tags", with json in it, like so:

In a derivative field I want to this field:
return row.tags.$[0]._key.path.segments[6];

...but that doesn't work. Nor does:
return row.tags.[0]._key.path.segments[6];
return row.tags.root[0]._key.path.segments[6];
return row.tags.x[0]._key.path.segments[6];

How do I access the path, when the first element is already an array?

Thanks a lot!

[shamsmosowi]

try return row.tags[0]._key.path.segments[6]

[webwurm]

Sadly that doesn't work. It throws the error Cannot read properties of undefined (reading 'path')

[shamsmosowi]

is this a firestore document reference?

[webwurm]

It's an array of references (see here in more detail)

[BeeBombshell]

Hey guys, closing this discussion. Follow the discussion #973 for updates on this.