Deleted a Firestore document, but its children are still there?
Deleting a Firestore parent does not cascade to its children. Reproduce the behavior locally, inspect exact paths and choose an explicit cleanup boundary.
Changed one Firestore setting and lost its neighbours? Check the field path
Reproduce map replacement versus leaf-field updates in a disposable Firestore emulator. Preserve sibling fields, handle literal dots and understand the limits.
You Added orderBy. Where Did Your Firestore Documents Go?
A Firestore sort can exclude documents that lack the ordered field. Reproduce it with three sample tasks before changing rules, indexes, or production data.
A Firestore query returns zero documents: debug it with a four-document fixture
Separate failed queries from empty results, then test types, filters, missing fields and cursors with a verified four-document Firestore fixture.