Firestore feature missing

[dsl400]

I could not find any information about deleteField and arrayUnion
Also updating nested document field ('level0.level1.level2') does not work

[LaughDonor]

You can delete a field by updating a document and providing all the fields without the one you want to delete, and not use the mask flag.

How did you try to update the nested document field? Can you please elaborate on the code with the simple example, @dsl400? Thanks!