lambda和DynamoDB连接

1. 在DynamoDB当作创建一个新表,然后在项目当中创建,把string value的值填写一下。
2. 在IAM创建角色附加 AWSLambdaDynamoDBExecutionRole权限
3. 在lambda中创建函数，选择DynamoDB不附加其他条件的蓝图
4. 选择第1步创建的DynamoDB表，完成lambda函数的创建。
5. 打开lambda函数的index.js,代码进行重写，内容如下

var AWS = require('aws-sdk');

var dynamo = new AWS.DynamoDB({

region: 'ap-northeast-1'

});

exports.handler = function(event, context) {

var params = {

"TableName": "sbrtest",         #表名

"KeyConditionExpression":"this = :sbrtest",   #建表时候的关键字和函数名

"ExpressionAttributeValues": {

":sbrtest" : {"S": event.sbrtest}    #函数名

}

};

console.log("event:", event);

dynamo.query(params, function(err, data) {

console.log("dynamo_data:", data);

console.log("dynamo_err:", err);

context.done(null, data);

});

};

1. 内容进行保存
2. 对编辑好的表进行测试，测试代码如下

{

"Records": [

{

"eventID": "1",

"eventVersion": "1.0",

"dynamodb": {

"Keys": {

"Id": {

"N": "101"

}

},

"NewImage": {

"Message": {

"S": "New item!"

},

"Id": {

"N": "101"

}

},

"StreamViewType": "NEW_AND_OLD_IMAGES",

"SequenceNumber": "111",

"SizeBytes": 26

},

"awsRegion": "ap-northeast-1",

"eventName": "INSERT",

"eventSourceARN": "arn:aws:dynamodb:ap-northeast-1:382459439888:table/sbrtest0313",

"eventSource": "aws:dynamodb"

},

{

"eventID": "2",

"eventVersion": "1.0",

"dynamodb": {

"OldImage": {

"Message": {

"S": "New item!"

},

"Id": {

"N": "101"

}

},

"SequenceNumber": "222",

"Keys": {

"Id": {

"N": "101"

}

},

"SizeBytes": 59,

"NewImage": {

"Message": {

"S": "This item has changed"

},

"Id": {

"N": "101"

}

},

"StreamViewType": "NEW_AND_OLD_IMAGES"

},

"awsRegion": "ap-northeast-1",

"eventName": "MODIFY",

"eventSourceARN": "arn:aws:dynamodb:ap-northeast-1:382459439888:table/sbrtest0313",

"eventSource": "aws:dynamodb"

},

{

"eventID": "3",

"eventVersion": "1.0",

"dynamodb": {

"Keys": {

"Id": {

"N": "101"

}

},

"SizeBytes": 38,

"SequenceNumber": "333",

"OldImage": {

"Message": {

"S": "This item has changed"

},

"Id": {

"N": "101"

}

},

"StreamViewType": "NEW_AND_OLD_IMAGES"

},

"awsRegion": "ap-northeast-1",

"eventName": "REMOVE",

"eventSourceARN": "arn:aws:dynamodb:ap-northeast-1:382459439888:table/sbrtest0313",

"eventSource": "aws:dynamodb"

}

]

}

1. 函数页面会显示测试成功
2. 在DynamoDB的触发选项中，也能够发现出现了新的数据。