在多个字段上对 Firestore 查询进行排序(异步)
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在多个字段上对 Firestore 查询进行排序(异步)。
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代码示例
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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 code demonstrates how to order a Firestore query on multiple fields using Python.\u003c/p\u003e\n"],["\u003cp\u003eThe example uses the \u003ccode\u003eorder_by()\u003c/code\u003e method to sort data by "state" and then by "population" in descending order.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication to Firestore is required, and Application Default Credentials can be set up for this purpose.\u003c/p\u003e\n"],["\u003cp\u003eThe full documentation can be found in the order and limit data documentation for Firebase Firestore.\u003c/p\u003e\n"]]],[],null,["# Ordering a Firestore query on multiple fields (async).\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Order and limit data](/firestore/native/docs/query-data/order-limit-data)\n- [Order and limit data with Cloud Firestore](https://firebase.google.com/docs/firestore/query-data/order-limit-data)\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 cities_ref = db.collection(\"cities\")\n cities_ref.order_by(\"state\").order_by(\n \"population\", direction=firestore.Query.DESCENDING\n )\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)."]]