Query a Firestore collection with an in array filter (async)

Query a Firestore collection with an in array filter (async).

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For detailed documentation that includes this code sample, see the following:

Code sample

Python

To authenticate to Firestore, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 

cities_ref = db.collection("cities")

query = cities_ref.where(
    filter=FieldFilter("regions", "in", [["west_coast"], ["east_coast"]])
)
return query

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