Alle Dokumente abrufen
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Alle Dokumente in einer Firestore-Sammlung abrufen
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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 content demonstrates how to retrieve all documents within a Firestore collection using various programming languages.\u003c/p\u003e\n"],["\u003cp\u003eThe provided code samples show how to fetch all documents from the "cities" collection in Firestore using C#, Go, Java, Node.js, PHP, Python, and Ruby.\u003c/p\u003e\n"],["\u003cp\u003eEach code example also highlights the necessity of setting up Application Default Credentials for authentication to Firestore before accessing data.\u003c/p\u003e\n"],["\u003cp\u003eThe document contains links to further resources for users to explore about retrieving and querying data from Firestore.\u003c/p\u003e\n"]]],[],null,["# Get all documents within a Firestore Collection\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Get data with Cloud Firestore](https://firebase.google.com/docs/firestore/query-data/get-data)\n- [Getting data](/firestore/native/docs/query-data/get-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 Query allCitiesQuery = db.Collection(\"cities\");\n QuerySnapshot allCitiesQuerySnapshot = await allCitiesQuery.GetSnapshotAsync();\n foreach (DocumentSnapshot documentSnapshot in allCitiesQuerySnapshot.Documents)\n {\n Console.WriteLine(\"Document data for {0} document:\", documentSnapshot.Id);\n Dictionary\u003cstring, object\u003e city = documentSnapshot.ToDictionary();\n foreach (KeyValuePair\u003cstring, object\u003e pair in city)\n {\n Console.WriteLine(\"{0}: {1}\", pair.Key, pair.Value);\n }\n Console.WriteLine(\"\");\n }\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\"fmt\"\n\n \t\"cloud.google.com/go/firestore\"\n \t\"google.golang.org/api/iterator\"\n )\n\n func allDocs(ctx context.Context, client *firestore.Client) error {\n \tfmt.Println(\"All cities:\")\n \titer := client.Collection(\"cities\").Documents(ctx)\n \tdefer iter.Stop()\n \tfor {\n \t\tdoc, err := iter.Next()\n \t\tif err == iterator.Done {\n \t\t\tbreak\n \t\t}\n \t\tif err != nil {\n \t\t\treturn err\n \t\t}\n \t\tfmt.Println(doc.https://cloud.google.com/go/docs/reference/cloud.google.com/go/firestore/latest/index.html#cloud_google_com_go_firestore_DocumentSnapshot_Data())\n \t}\n \treturn nil\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 // asynchronously retrieve all documents\n ApiFuture\u003cQuerySnapshot\u003e future = db.collection(\"cities\").get();\n // future.get() blocks on response\n List\u003cQueryDocumentSnapshot\u003e documents = future.get().getDocuments();\n for (QueryDocumentSnapshot document : documents) {\n System.out.println(document.getId() + \" =\u003e \" + document.toObject(City.class));\n }\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 citiesRef = db.collection('cities');\n const snapshot = await citiesRef.get();\n snapshot.forEach(doc =\u003e {\n console.log(doc.id, '=\u003e', doc.data());\n });\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 $citiesRef = $db-\u003ecollection('samples/php/cities');\n $documents = $citiesRef-\u003edocuments();\n foreach ($documents as $document) {\n if ($document-\u003eexists()) {\n printf('Document data for document %s:' . PHP_EOL, $document-\u003eid());\n print_r($document-\u003edata());\n printf(PHP_EOL);\n } else {\n printf('Document %s does not exist!' . PHP_EOL, $document-\u003eid());\n }\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 docs = db.collection(\"cities\").stream()\n\n for doc in docs:\n print(f\"{doc.id} =\u003e {doc.to_dict()}\")\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 cities_ref = firestore.col collection_path\n cities_ref.get do |city|\n puts \"#{city.document_id} data: #{city.data}.\"\n end\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)."]]