使用游标“结束于”过滤条件查询 Firestore 集合
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使用游标“结束于”过滤条件查询 Firestore 集合
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[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis page demonstrates how to query a Firestore collection using the \u003ccode\u003eendAt\u003c/code\u003e filter, which allows you to specify the ending point for your data retrieval.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code samples, available in C#, Go, Java, Node.js, PHP, Python, and Ruby, all show how to implement the \u003ccode\u003eendAt\u003c/code\u003e method with an example based on population.\u003c/p\u003e\n"],["\u003cp\u003eBefore executing queries, you must set up Application Default Credentials for authenticating to Firestore as outlined in the documentation link.\u003c/p\u003e\n"],["\u003cp\u003eThe example code snippets on this page provide a foundation for understanding and implementing query cursor pagination to retrieve data effectively, allowing you to view the documentation for more detail.\u003c/p\u003e\n"]]],[],null,["# Query a Firestore collection with a cursor end at filter\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Paginate data with query cursors](/firestore/native/docs/query-data/query-cursors)\n- [Paginate data with query cursors](https://firebase.google.com/docs/firestore/query-data/query-cursors)\n\nCode sample\n-----------\n\n### C#\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 Query query = citiesRef.OrderBy(\"Population\").EndAt(1000000);\n\n### Go\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 query := client.Collection(\"cities\").OrderBy(\"population\", firestore.Asc).EndAt(1000000)\n\n### Java\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 Query query = cities.orderBy(\"population\").endAt(4921000L);\n\n### Node.js\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 const endAtRes = await db.collection('cities')\n .orderBy('population')\n .endAt(1000000)\n .get();\n\n### PHP\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 $query = $citiesRef\n -\u003eorderBy('population')\n -\u003eendAt([1000000]);\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 cities_ref = db.collection(\"cities\")\n query_end_at = cities_ref.order_by(\"population\").end_at({\"population\": 1000000})\n\n### Ruby\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 query = cities_ref.order(\"population\").end_at(1_000_000)\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)."]]