英文:
How to fix error with AWS Lambda handler, DynamoDB Put req?
问题
尝试创建一个与我的DynamoDB交互的Lambda函数。
这个特定的Lambda函数是用来将一个项目写入DB的：
package mainimport ("fmt""github.com/aws/aws-lambda-go/lambda""github.com/aws/aws-sdk-go/aws""github.com/aws/aws-sdk-go/aws/session""github.com/aws/aws-sdk-go/service/dynamodb""github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute")type Item struct {Email string `json:"email"`Password string `json:"password"`Rname string `json:"rname"`}func Put() error {// 创建一个会话 - 伦敦地区session, err := session.NewSession(&aws.Config{Region: aws.String("eu-west-2")},)if err != nil {fmt.Println(err)}svc := dynamodb.New(session)// 创建Item结构的实例item := Item{Email: "123@mail.com",Password: "12345678",Rname: "abcde",}// 将Item进行编组av, err := dynamodbattribute.MarshalMap(item)if err != nil {fmt.Println("Got error marshalling map:")fmt.Println(err)}// 创建Iteminput := &dynamodb.PutItemInput{Item: av,TableName: aws.String("accountsTable"),}_, err = svc.PutItem(input)if err != nil {fmt.Println("Got error calling PutItem:")fmt.Println(err)}return err}func main() {lambda.Start(Put())}
然而，出现了以下错误：
{"errorMessage": "handler is nil","errorType": "errorString"}
我已经在运行时设置中将处理程序更改为main，所以不认为这是问题所在。
使用以下命令构建：
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -a main.go
并通过控制台将可执行文件的zip文件放入AWS（没有IAC）。
非常感谢您提供帮助以解决此错误！谢谢。
英文:
Trying to create a Lambda to interact with my DynamoDB.
This specific Lambda is to put/write an item to the DB:
package mainimport ("fmt""github.com/aws/aws-lambda-go/lambda""github.com/aws/aws-sdk-go/aws""github.com/aws/aws-sdk-go/aws/session""github.com/aws/aws-sdk-go/service/dynamodb""github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute")type Item struct {Email string `json:"email"`Password string `json:"password"`Rname string `json:"rname"`}func Put() error {// Create a session - London Regionsession, err := session.NewSession(&aws.Config{Region: aws.String("eu-west-2")},)if err != nil {fmt.Println(err)}svc := dynamodb.New(session)// Create instance of Item Structitem := Item{Email: "123@mail.com",Password: "12345678",Rname: "abcde",}// Marshall Itemav, err := dynamodbattribute.MarshalMap(item)if err != nil {fmt.Println("Got error marshalling map:")fmt.Println(err)}// Create Iteminput := &dynamodb.PutItemInput{Item: av,TableName: aws.String("accountsTable"),}_, err = svc.PutItem(input)if err != nil {fmt.Println("Got error calling PutItem:")fmt.Println(err)}return err}func main() {lambda.Start(Put())}
However getting the error:
{"errorMessage": "handler is nil","errorType": "errorString"}
I have changed the handler in run time settings to main too so don't think that would be the issue.
Building with:
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -a main.go
and putting the zip of the executable into AWS via console (no IAC's)
Any help would be greatly appreciated to resolve this error! Thanks.
答案1
得分: 1
你需要传递函数句柄而不是函数结果给lambda.Start。
请使用以下代码更新你的主函数：
func main() {lambda.Start(Put)}
英文:
You need to pass function handle not function result to lambda.Start
Please update your main function with👇
func main() {lambda.Start(Put)}
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