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[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis document provides code samples for querying Datastore metadata, specifically retrieving a list of kinds, across multiple languages.\u003c/p\u003e\n"],["\u003cp\u003eThe code samples demonstrate how to use the \u003ccode\u003e__kind__\u003c/code\u003e query to retrieve the names of entity kinds in Datastore for C#, Go, Java, Node.js, PHP, Python, and Ruby.\u003c/p\u003e\n"],["\u003cp\u003eEach language section includes links to install and use the Datastore client library, as well as links to the relevant API reference documentation.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication to Datastore is mentioned, advising users to set up Application Default Credentials and linking to instructions on how to do so.\u003c/p\u003e\n"],["\u003cp\u003eThe document directs readers to the Google Cloud sample browser to find other code samples related to Datastore and other Google Cloud products.\u003c/p\u003e\n"]]],[],null,["# Kind query.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Datastore Metadata](/datastore/docs/concepts/metadataqueries)\n\nCode sample\n-----------\n\n### C#\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode C# API\nreference documentation](https://cloud.google.com/dotnet/docs/reference/Google.Cloud.Datastore.V1/latest).\n\n\nTo authenticate to Datastore mode, 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 query = new Query(\"__kind__\");\n var kinds = new List\u003cstring\u003e();\n foreach (Entity entity in _db.RunQuery(query).Entities)\n {\n kinds.Add(entity.Key.Path[0].Name);\n };\n\n### Go\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode Go API\nreference documentation](https://cloud.google.com/go/docs/reference/cloud.google.com/go/datastore/latest).\n\n\nTo authenticate to Datastore mode, 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 := datastore.NewQuery(\"__kind__\").KeysOnly()\n keys, err := client.GetAll(ctx, query, nil)\n if err != nil {\n \tlog.Fatalf(\"client.GetAll: %v\", err)\n }\n\n kinds := make([]string, 0, len(keys))\n for _, k := range keys {\n \tkinds = append(kinds, k.Name)\n }\n\n### Java\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode Java API\nreference documentation](https://cloud.google.com/java/docs/reference/google-cloud-datastore/latest/history).\n\n\nTo authenticate to Datastore mode, 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\u003cKey\u003e query = Query.newKeyQueryBuilder().setKind(\"__kind__\").build();\n List\u003cString\u003e kinds = new ArrayList\u003c\u003e();\n QueryResults\u003cKey\u003e results = datastore.run(query);\n while (results.hasNext()) {\n kinds.add(results.next().getName());\n }\n\n### Node.js\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode Node.js API\nreference documentation](https://cloud.google.com/nodejs/docs/reference/datastore/latest).\n\n\nTo authenticate to Datastore mode, 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 async function runKindQuery() {\n const query = datastore.createQuery('__kind__').select('__key__');\n\n const [entities] = await datastore.runQuery(query);\n const kinds = entities.map(entity =\u003e entity[datastore.KEY].name);\n\n console.log('Kinds:');\n kinds.forEach(kind =\u003e console.log(kind));\n\n return kinds;\n }\n\n### PHP\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode PHP API\nreference documentation](https://googleapis.github.io/google-cloud-php/#/docs/cloud-datastore/latest).\n\n\nTo authenticate to Datastore mode, 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 = $datastore-\u003equery()\n -\u003ekind('__kind__')\n -\u003eprojection(['__key__']);\n $result = $datastore-\u003erunQuery($query);\n /* @var array\u003cstring\u003e $kinds */\n $kinds = [];\n foreach ($result as $kind) {\n $kinds[] = $kind-\u003ekey()-\u003epathEnd()['name'];\n }\n\n### Python\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode Python API\nreference documentation](https://cloud.google.com/python/docs/reference/datastore/latest).\n\n\nTo authenticate to Datastore mode, 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 from google.cloud import https://cloud.google.com/python/docs/reference/datastore/latest/\n\n # For help authenticating your client, visit\n # https://cloud.google.com/docs/authentication/getting-started\n client = https://cloud.google.com/python/docs/reference/datastore/latest/.https://cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.client.Client.html()\n\n query = client.https://cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.client.Client.html#google_cloud_datastore_client_Client_query(kind=\"__kind__\")\n query.https://cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.query.Query.html#google_cloud_datastore_query_Query_keys_only()\n\n kinds = [entity.key.https://cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.key.Key.html#google_cloud_datastore_key_Key_id_or_name for entity in query.fetch()]\n\n### Ruby\n\n\nTo learn how to install and use the client library for Datastore mode, see\n[Datastore mode client libraries](/datastore/docs/reference/libraries).\n\n\nFor more information, see the\n[Datastore mode Ruby API\nreference documentation](/ruby/docs/reference/google-cloud-datastore/latest).\n\n\nTo authenticate to Datastore mode, 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 = datastore.query(\"__kind__\")\n .select(\"__key__\")\n\n kinds = datastore.run(query).map do |entity|\n entity.key.name\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=datastore)."]]
