Node.js 如果值是重复的DynamoDB,则删除行
我试图比较dynambodb是否有重复的电话号码,如果有,我想删除旧的电话号码。通过lambda这样做似乎没有太多。我们将非常感谢您的帮助。谢谢Node.js 如果值是重复的DynamoDB,则删除行,node.js,aws-lambda,amazon-dynamodb,Node.js,Aws Lambda,Amazon Dynamodb,我试图比较dynambodb是否有重复的电话号码,如果有,我想删除旧的电话号码。通过lambda这样做似乎没有太多。我们将非常感谢您的帮助。谢谢 const dynamoDb = new AWS.DynamoDB.DocumentClient(); const params = { TableName: process.env.DYNAMODB_TABLE, ProjectionExpression: "phoneNumber, createdAt", }; module.export
const dynamoDb = new AWS.DynamoDB.DocumentClient();
const params = {
TableName: process.env.DYNAMODB_TABLE,
ProjectionExpression: "phoneNumber, createdAt",
};
module.exports.list = (event, context, callback) => {
// fetch all LakeSubscriptions from the database
dynamoDb.scan(params, (error, result) => {
// handle potential errors
if (error) {
console.error(error);
callback(null, {
statusCode: error.statusCode || 501,
headers: { 'Content-Type': 'text/plain' },
body: 'Couldn\'t fetch the item.',
});
return;
}
/*
for(item in result.phoneNumber){ //not really sure how I can pull these individual values I need to use to compare.
module.exports.delete = (event, context, callback) => {
const params = {
TableName: process.env.DYNAMODB_TABLE,
Key: {
id: event.pathParameters.id,
},
};
// delete the lakeSubscription from the database
dynamoDb.delete(params, (error) => {
// handle potential errors
if (error) {
//error handling
});
return;
}
});
};
}
*/
// create a response
const response = {
statusCode: 200,
body: JSON.stringify(result.Items),
};
callback(null, response);
});
};
不是Node.JS方面的专家,但有一些建议 扫描操作结果以每个1MB的页面返回,因此上面的代码不会返回dynamodb中的所有行。请参阅步骤4.3:本文档的扫描 这将使您了解如何分页并从dynamodb获取所有记录。您可以添加所有结果 另请参阅以下帖子 这会给你一个更好的主意