Getting a Firestore document while using shards (async)

Getting a Firestore document while using shards (async).

Explore further

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

• Distributed counters
• Support frequent and distributed counters

Code sample

Python

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

async def get_count(self, doc_ref):
    """Return a total count across all shards."""
    total = 0
    shards = doc_ref.collection("shards").list_documents()
    async for shard in shards:
        total += (await shard.get()).to_dict().get("count", 0)
    return total

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