{"id":1803,"date":"2021-08-25T09:34:17","date_gmt":"2021-08-25T00:34:17","guid":{"rendered":"https:\/\/dennie.tokyo\/it\/?p=1803"},"modified":"2022-04-03T15:40:03","modified_gmt":"2022-04-03T06:40:03","slug":"%e3%80%90dynamodb%e3%80%91aws-sdk-%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%9f%e5%8d%98%e4%b8%80%e9%a0%85%e7%9b%ae%e3%81%ae%e5%8f%96%e5%be%97","status":"publish","type":"post","link":"https:\/\/dennie.tokyo\/it\/?p=1803","title":{"rendered":"\u3010DynamoDB\u3011AWS SDK \u3092\u4f7f\u7528\u3057\u305f\u5358\u4e00\u9805\u76ee\u306e\u53d6\u5f97"},"content":{"rendered":"\n

\u4eca\u307e\u3067\u306f\u9805\u76ee\u306e\u8ffd\u52a0\u3001\u66f4\u65b0\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n\n\n\n\n

\u306a\u304a\u3001\u524d\u56de\u306f\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u4e0b\u3055\u3044\u3002<\/p>\n\n\n\n

\u524d\u56de<\/span>\n

\u3010DynamoDB\u3011AWS SDK \u3092\u4f7f\u7528\u3057\u305f\u9805\u76ee\u306e\u66f4\u65b0<\/a><\/p>\n<\/div>\n\n\n\n

\u4eca\u56de\u306f\u9805\u76ee\u306e\u53d6\u5f97\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u9805\u76ee\u306e\u53d6\u5f97<\/h1>\n\n\n\n

\u9805\u76ee\u306e\u53d6\u5f97\u306b\u306f getItem \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
getItem \u306f\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u306e\u5024\u3092\u6307\u5b9a\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u30c6\u30fc\u30d6\u30eb\u306e\u5185\u5bb9<\/h1>\n\n\n\n

Musics\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066 getItem \u3092\u5b9f\u884c\u3057\u307e\u3059\u3002
\u30c6\u30fc\u30d6\u30eb\u306e\u5185\u5bb9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

artist: \u30d1\u30fc\u30c6\u30b7\u30e7\u30f3\u30ad\u30fc
title: \u30bd\u30fc\u30c8\u30ad\u30fc<\/p>\n\n\n\n

\u5168\u5c5e\u6027\u53d6\u5f97<\/h1>\n\n\n\n

getItem\u306f\u5358\u4e00\u9805\u76ee\u3092\u53d6\u5f97\u3057\u3001\u5168\u5c5e\u6027\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u5b9f\u884c<\/h2>\n\n\n\n
const DynamoDbSetter = require(".\/DynamoDbSetter");\n \nmodule.exports = class DynamoDbOperator extends DynamoDbSetter{\n \n    async exec() {\n \n        \/\/ \u5b9f\u884c\u5185\u5bb9\n        let params = {\n            TableName : "Musics",\n            Key:{ \n                "artist": {"S":"B'z"},\n                "title": {"S": "GREEN"},\n            },\n            ReturnConsumedCapacity: "INDEXES"\n        };\n    \n        \/\/ \u5b9f\u884c\n        return await this.dynamodb.getItem(params).promise();\n \n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u5b9f\u884c\u5185\u5bb9\u306e\u8aac\u660e<\/h2>\n\n\n\n
Key<\/h3>\n\n\n\n
Key\u306b\u306f\u53d6\u5f97\u3057\u305f\u3044\u9805\u76ee\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3092\u6307\u5b9a\u3057\u3066\u4e0b\u3055\u3044\u3002<\/p>\n\n\n\n
ReturnConsumedCapacity<\/h3>\n\n\n\n
ReturnConsumedCapacity \u306e\u6307\u5b9a\u306f putItem\u3001updateItem \u3068\u540c\u3058\u3067\u3059\u3002
\u623b\u308a\u5024\u306e\u6307\u5b9a\u306f\u4efb\u610f\u306a\u306e\u3067\u9069\u5b9c\u6307\u5b9a\u3057\u3066\u4e0b\u3055\u3044\u3002
\u307e\u305f\u3001\u623b\u308a\u5024\u306b\u3064\u3044\u3066\u306f\u524d\u56de\u3092\u53c2\u8003\u306b\u3057\u3066\u4e0b\u3055\u3044\u3002<\/p>\n\n\n\n
\u524d\u56de<\/span>\n
\u3010DynamoDB\u3011AWS SDK \u3092\u4f7f\u7528\u3057\u305f\u9805\u76ee\u306e\u66f4\u65b0<\/a><\/p>\n<\/div>\n\n\n\n
\u7d50\u679c<\/h2>\n\n\n\n
{\n    "Item": {\n        "artist": {\n            "S": "B'z"\n        },\n        "sngsCnt": {\n            "N": "12"\n        },\n        "title": {\n            "S": "GREEN"\n        }\n    },\n    "ConsumedCapacity": {\n        "TableName": "Musics",\n        "CapacityUnits": 0.5,\n        "Table": {\n            "CapacityUnits": 0.5\n        }\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u6307\u5b9a\u3057\u305f\u5c5e\u6027\u306e\u307f\u53d6\u5f97<\/h1>\n\n\n\n
\u6307\u5b9a\u3057\u305f\u5c5e\u6027\u306e\u307f\u7d50\u679c\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u3001ProjectionExpression \u306b\u5c5e\u6027\u540d\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u5b9f\u884c<\/h2>\n\n\n\n
const DynamoDbSetter = require(".\/DynamoDbSetter");\n \nmodule.exports = class DynamoDbOperator extends DynamoDbSetter{\n \n    async exec() {\n \n        \/\/ \u5b9f\u884c\u5185\u5bb9\n        let params = {\n            TableName : "Musics",\n            Key:{ \n                "artist": {"S":"B'z"},\n                "title": {"S": "GREEN"},\n            },\n            ProjectionExpression: "sngsCnt, title",\n            ReturnConsumedCapacity: "INDEXES"\n        };\n    \n        \/\/ \u5b9f\u884c\n        return await this.dynamodb.getItem(params).promise();\n \n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u5b9f\u884c\u5185\u5bb9\u306e\u8aac\u660e<\/h2>\n\n\n\n
ProjectionExpression<\/h3>\n\n\n\n
ProjectionExpression \u3078\u5c5e\u6027\u540d\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u6307\u5b9a\u3057\u305f\u5c5e\u6027\u306e\u307f\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u7d50\u679c<\/h2>\n\n\n\n
{\n    "Item": {\n        "sngsCnt": {\n            "N": "12"\n        },\n        "title": {\n            "S": "GREEN"\n        }\n    },\n    "ConsumedCapacity": {\n        "TableName": "Musics",\n        "CapacityUnits": 0.5,\n        "Table": {\n            "CapacityUnits": 0.5\n        }\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u5f37\u529b\u306a\u751f\u5408\u6210\u8aad\u307f\u8fbc\u307f<\/h1>\n\n\n\n
\u5f37\u529b\u306a\u751f\u5408\u6210\u8aad\u307f\u8fbc\u307f\u3092\u884c\u3044\u305f\u3044\u5834\u5408\u3001ConsistentRead \u3092 true \u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u5b9f\u884c<\/h2>\n\n\n\n
const DynamoDbSetter = require(".\/DynamoDbSetter");\n \nmodule.exports = class DynamoDbOperator extends DynamoDbSetter{\n \n    async exec() {\n \n        \/\/ \u5b9f\u884c\u5185\u5bb9\n        let params = {\n            TableName : "Musics",\n            Key:{ \n                "artist": {"S":"B'z"},\n                "title": {"S": "GREEN"},\n            },\n            ConsistentRead: true,\n            ProjectionExpression: "sngsCnt, title",\n            ReturnConsumedCapacity: "INDEXES"\n        };\n    \n        \/\/ \u5b9f\u884c\n        return await this.dynamodb.getItem(params).promise();\n \n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u5b9f\u884c\u5185\u5bb9\u306e\u8aac\u660e<\/h2>\n\n\n\n
ConsistentRead<\/h3>\n\n\n\n
ConsistentRead \u3092 true \u306b\u6307\u5b9a\u3059\u308b\u3068\u3001\u5f37\u529b\u306a\u6574\u5408\u6027\u8aad\u307f\u8fbc\u307f\u304c\u884c\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\u7d50\u679c<\/h2>\n\n\n\n
{\n    "Item": {\n        "sngsCnt": {\n            "N": "12"\n        },\n        "title": {\n            "S": "GREEN"\n        }\n    },\n    "ConsumedCapacity": {\n        "TableName": "Musics",\n        "CapacityUnits": 1,\n        "Table": {\n            "CapacityUnits": 1\n        }\n    }\n}<\/code><\/pre><\/div>\n\n\n\n
\u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u30e6\u30cb\u30c3\u30c8\u304c0.5\u3067\u306f\u306a\u304f1\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u6700\u5f8c\u306b<\/h1>\n\n\n\n
\u9805\u76ee\u306e\u53d6\u5f97\u306b\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u306e\u5024\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002
\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u4ee5\u5916\u306e\u5c5e\u6027\u3092\u4f7f\u7528\u3057\u3066\u9805\u76ee\u3092\u53d6\u5f97\u3057\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002
\u3053\u306e\u3088\u3046\u306a\u6642\u306bDynamoDB\u3067\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304b\u3089\u9805\u76ee\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002
\u6b21\u56de\u306f\u30bb\u30ab\u30f3\u30c0\u30ea\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u6b21\u56de<\/span>\n
\u3010DynamoDB\u3011AWS SDK \u3092\u4f7f\u7528\u3057\u305f\u30b0\u30ed\u30fc\u30d0\u30eb\u30bb\u30ab\u30f3\u30c0\u30ea\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4f5c\u6210<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u4eca\u307e\u3067\u306f\u9805\u76ee\u306e\u8ffd\u52a0\u3001\u66f4\u65b0\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"author":1,"featured_media":1258,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,19,20],"tags":[],"class_list":["post-1803","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aws","category-dynamodb","category-lambda"],"_links":{"self":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/1803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1803"}],"version-history":[{"count":24,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/1803\/revisions"}],"predecessor-version":[{"id":3408,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/1803\/revisions\/3408"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/media\/1258"}],"wp:attachment":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}