Firestore-Dokumentfeld aktualisieren
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Firestore-Dokumentfeld aktualisieren
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[[["Leicht verständlich","easyToUnderstand","thumb-up"],["Mein Problem wurde gelöst","solvedMyProblem","thumb-up"],["Sonstiges","otherUp","thumb-up"]],[["Schwer verständlich","hardToUnderstand","thumb-down"],["Informationen oder Beispielcode falsch","incorrectInformationOrSampleCode","thumb-down"],["Benötigte Informationen/Beispiele nicht gefunden","missingTheInformationSamplesINeed","thumb-down"],["Problem mit der Übersetzung","translationIssue","thumb-down"],["Sonstiges","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis page provides code samples for updating a field in a Firestore document across multiple languages including C#, Go, Java, Node.js, PHP, Python, and Ruby.\u003c/p\u003e\n"],["\u003cp\u003eThe code examples demonstrate how to use each language's specific syntax to update a single field within a Firestore document.\u003c/p\u003e\n"],["\u003cp\u003eEach language section highlights the importance of setting up Application Default Credentials for authenticating with Firestore, referencing an external documentation link for setting up authentication for a local development environment.\u003c/p\u003e\n"],["\u003cp\u003eThe samples reference the \u003ccode\u003ecities\u003c/code\u003e collection in Firestore, updating a field value called "Capital" or "capital" to either \u003ccode\u003etrue\u003c/code\u003e or \u003ccode\u003efalse\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,["# Update a Firestore document field\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Add and update data](/firestore/native/docs/manage-data/add-data)\n- [Add data to Cloud Firestore](https://firebase.google.com/docs/firestore/manage-data/add-data)\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 DocumentReference cityRef = db.Collection(\"cities\").Document(\"new-city-id\");\n Dictionary\u003cstring, object\u003e updates = new Dictionary\u003cstring, object\u003e\n {\n { \"Capital\", false }\n };\n await cityRef.UpdateAsync(updates);\n\n // You can also update a single field with: await cityRef.UpdateAsync(\"Capital\", false);\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\n import (\n \t\"context\"\n \t\"log\"\n\n \t\"cloud.google.com/go/firestore\"\n )\n\n func updateDoc(ctx context.Context, client *firestore.Client) error {\n \t// ...\n\n \t_, err := client.Collection(\"cities\").Doc(\"DC\").Update(ctx, []firestore.Update{\n \t\t{\n \t\t\tPath: \"capital\",\n \t\t\tValue: true,\n \t\t},\n \t})\n \tif err != nil {\n \t\t// Handle any errors in an appropriate way, such as returning them.\n \t\tlog.Printf(\"An error has occurred: %s\", err)\n \t}\n\n \treturn err\n }\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 // Update an existing document\n DocumentReference docRef = db.collection(\"cities\").document(\"DC\");\n\n // (async) Update one field\n ApiFuture\u003cWriteResult\u003e future = docRef.update(\"capital\", true);\n\n // ...\n WriteResult result = future.get();\n System.out.println(\"Write result: \" + result);\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 cityRef = db.collection('cities').doc('DC');\n\n // Set the 'capital' field of the city\n const res = await cityRef.update({capital: true});\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 $cityRef = $db-\u003ecollection('samples/php/cities')-\u003edocument('DC');\n $cityRef-\u003eupdate([\n ['path' =\u003e 'capital', 'value' =\u003e true]\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 city_ref = db.collection(\"cities\").document(\"DC\")\n\n # Set the capital field\n city_ref.update({\"capital\": True})\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 city_ref = firestore.doc \"#{collection_path}/DC\"\n city_ref.update({ capital: true })\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)."]]