Aggiorna il campo di un documento Firestore
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Aggiorna il campo di un documento Firestore
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Esempio di codice
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","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)."]]