Crea il riferimento a un documento Firestore con un ID generato automaticamente
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Crea il riferimento a un documento Firestore con un ID generato automaticamente
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Esempio di codice
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[[["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 demonstrates how to create a Firestore document reference with an automatically generated ID across various programming languages.\u003c/p\u003e\n"],["\u003cp\u003eThe code samples provided illustrate the process of creating a new document reference, setting data to it, and then displaying or using the autogenerated ID.\u003c/p\u003e\n"],["\u003cp\u003eAll code samples instruct setting up Application Default Credentials for Firestore authentication.\u003c/p\u003e\n"],["\u003cp\u003eEach language's example showcases creating a reference within the "cities" collection, highlighting the commonality in approaching autogenerated document ID creation.\u003c/p\u003e\n"]]],[],null,["Create a Firestore document reference with an autogenerated id\n\nExplore further\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\nC#\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 addedDocRef = db.Collection(\"cities\").Document();\n Console.WriteLine(\"Added document with ID: {0}.\", addedDocRef.Id);\n await addedDocRef.SetAsync(city);\n\nGo\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 addDocAfterAutoGeneratedID(ctx context.Context, client *firestore.Client) error {\n \tdata := City{\n \t\tName: \"Sydney\",\n \t\tCountry: \"Australia\",\n \t}\n\n \tref := client.Collection(\"cities\").https://cloud.google.com/go/docs/reference/cloud.google.com/go/firestore/latest/index.html#cloud_google_com_go_firestore_CollectionRef_NewDoc()\n\n \t// later...\n \t_, err := ref.Set(ctx, data)\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\nJava\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 // Add document data after generating an id.\n DocumentReference addedDocRef = db.collection(\"cities\").document();\n System.out.println(\"Added document with ID: \" + addedDocRef.getId());\n\n // later...\n ApiFuture\u003cWriteResult\u003e writeResult = addedDocRef.set(data);\n\nNode.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 newCityRef = db.collection('cities').doc();\n\n // Later...\n const res = await newCityRef.set({\n // ...\n });\n\nPHP\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 $addedDocRef = $db-\u003ecollection('samples/php/cities')-\u003enewDocument();\n printf('Added document with ID: %s' . PHP_EOL, $addedDocRef-\u003eid());\n $addedDocRef-\u003eset($data);\n\nPython\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 new_city_ref = db.collection(\"cities\").document()\n\n # later...\n new_city_ref.set(\n {\n # ...\n }\n )\n\nRuby\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 = firestore.col collection_path\n\n added_doc_ref = cities_ref.doc\n puts \"Added document with ID: #{added_doc_ref.document_id}.\"\n\n added_doc_ref.set data\n\nWhat's next\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=firestore)."]]