Query from documentation doesn't return expected result

[marcusx2]

Operating System

macOS

Browser Version

Safari 16.5.2

Firebase SDK Version

10.5.0

Firebase SDK Product:

Firestore

Describe your project's tooling

index.html with source tag. Just javascript.

Describe the problem

The following query does not work, no document is returned

const db = getFirestore();
const citiesRef = collection(db, "cities");
querySnapshot = await getDocs(query(citiesRef, where("regions", "in", [ [ "west_coast", "east_coast" ] ])));
querySnapshot.forEach(doc => console.log(doc.id));

The code in question is documented here, you need to scroll up a little bit. Or search for the text "array-contains-any always filters by the array data type".

The documentation explicitly states "From the example data, only the DC document qualifies with its regions field of ["east_coast"]". However, it does not return the DC document, or any document for that matter.

You have to set up the data first.

Steps and code to reproduce issue

Already explained.

[MarkDuckworth]

@morganchen12, can you help me get this to the right person to modify these code snippets and documentation across all SDKs? We need to correct snippets and documentation for the in operator across all SDK languages.