How to fix error with AWS Lambda handler, DynamoDB Put req? - amazon-web-services

Question

Trying to create a Lambda to interact with my DynamoDB.
This specific Lambda is to put/write an item to the DB:
package main
import (
"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 Region
session, 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 Struct
item := Item{
Email: "123#mail.com",
Password: "12345678",
Rname: "abcde",
}
// Marshall Item
av, err := dynamodbattribute.MarshalMap(item)
if err != nil {
fmt.Println("Got error marshalling map:")
fmt.Println(err)
}
// Create Item
input := &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.

Answer 1

You need to pass function handle not function result to lambda.Start
Please update your main function with👇
func main() {
lambda.Start(Put)
}