Mendapatkan dokumen Firestore saat menggunakan sharding (asinkron)
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Mendapatkan dokumen Firestore saat menggunakan sharding (asinkron).
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Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis code sample demonstrates how to retrieve a total count across multiple shards in a Firestore document asynchronously.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eget_count\u003c/code\u003e function iterates through shard documents within a specified collection, summing the "count" value from each.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication to Firestore is required using Application Default Credentials as outlined in the provided link.\u003c/p\u003e\n"],["\u003cp\u003eThe detailed documentation about distributed counters can be consulted at the given link.\u003c/p\u003e\n"]]],[],null,["# Getting a Firestore document while using shards (async).\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Distributed counters](https://firebase.google.com/docs/firestore/solutions/counters)\n- [Support frequent and distributed counters](/firestore/native/docs/solutions/counters)\n\nCode sample\n-----------\n\n### Python\n\n\nTo authenticate to Firestore, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n async def get_count(self, doc_ref):\n \"\"\"Return a total count across all shards.\"\"\"\n total = 0\n shards = doc_ref.collection(\"shards\").list_documents()\n async for shard in shards:\n total += (await shard.get()).to_dict().get(\"count\", 0)\n return total\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=firestore)."]]
