Javascript DynamoDB：检索数据的动态函数

如何使用Node.js创建一个动态函数，使用query方法从AWS DynamoDB检索数据？ 函数应该能够获取参数，如TableName、IndexName、Key、Value、SortKey、SortValue、Filter、FilterValue、SecondFilter、SecondFildValue、ScanIndexForward、Limit。支持从表中获取所有项的功能将非常好，因为DynamoDB查询只检索部分项

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提前感谢。

您看过AWS github示例repo中的JavaScript示例了吗？如果没有，您可以在这里找到它们：

您看过AWS github示例repo中的JavaScript示例了吗？如果没有，您将在此处找到它们：

这里是一个示例，您可以修改并添加所需的参数

/* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
ABOUT THIS NODE.JS EXAMPLE: This example works with AWS SDK for JavaScript version 3 (v3),
which is available at https://github.com/aws/aws-sdk-js-v3. This example is in the 'AWS SDK for JavaScript v3 Developer Guide' at
https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/dynamodb-example-query-scan.html.
Purpose:
ddb_query.ts demonstrates how to find items in an Amazon DynamoDB table.
Inputs (replace in code):
- REGION
Running the code:
ts-node ddb_query.ts
*/
// snippet-start:[dynamodb.JavaScript.table.queryV3]

// Import required AWS SDK clients and commands for Node.js
const { DynamoDBClient, QueryCommand } = require("@aws-sdk/client-dynamodb");

// Set the AWS Region
const REGION = "region"; //e.g. "us-east-1"

// Set the parameters
const params = {
  KeyConditionExpression: "Season = :s and Episode > :e",
  FilterExpression: "contains (Subtitle, :topic)",
  ExpressionAttributeValues: {
    ":s": { N: "1" },
    ":e": { N: "2" },
    ":topic": { S: "SubTitle" },
  },
  ProjectionExpression: "Episode, Title, Subtitle",
  TableName: "EPISODES_TABLE",
};

// Create DynamoDB service object
const dbclient = new DynamoDBClient({ region: REGION });
const run = async () => {
  try {
    const results = await dbclient.send(new QueryCommand(params));
    results.Items.forEach(function (element, index, array) {
      console.log(element.Title.S + " (" + element.Subtitle.S + ")");
    });
  } catch (err) {
    console.error(err);
  }
};
run();
// snippet-end:[dynamodb.JavaScript.table.queryV3]

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下面是一个示例，您可以修改和添加所需的参数

/* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
ABOUT THIS NODE.JS EXAMPLE: This example works with AWS SDK for JavaScript version 3 (v3),
which is available at https://github.com/aws/aws-sdk-js-v3. This example is in the 'AWS SDK for JavaScript v3 Developer Guide' at
https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/dynamodb-example-query-scan.html.
Purpose:
ddb_query.ts demonstrates how to find items in an Amazon DynamoDB table.
Inputs (replace in code):
- REGION
Running the code:
ts-node ddb_query.ts
*/
// snippet-start:[dynamodb.JavaScript.table.queryV3]

// Import required AWS SDK clients and commands for Node.js
const { DynamoDBClient, QueryCommand } = require("@aws-sdk/client-dynamodb");

// Set the AWS Region
const REGION = "region"; //e.g. "us-east-1"

// Set the parameters
const params = {
  KeyConditionExpression: "Season = :s and Episode > :e",
  FilterExpression: "contains (Subtitle, :topic)",
  ExpressionAttributeValues: {
    ":s": { N: "1" },
    ":e": { N: "2" },
    ":topic": { S: "SubTitle" },
  },
  ProjectionExpression: "Episode, Title, Subtitle",
  TableName: "EPISODES_TABLE",
};

// Create DynamoDB service object
const dbclient = new DynamoDBClient({ region: REGION });
const run = async () => {
  try {
    const results = await dbclient.send(new QueryCommand(params));
    results.Items.forEach(function (element, index, array) {
      console.log(element.Title.S + " (" + element.Subtitle.S + ")");
    });
  } catch (err) {
    console.error(err);
  }
};
run();
// snippet-end:[dynamodb.JavaScript.table.queryV3]

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你试过什么？你被困在哪里？就目前情况而言，这个问题听起来像是你希望有人为你做这项工作。你试过什么？你被困在哪里？就目前而言，这个问题听起来像是你想要有人为你做这项工作。