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 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 {
// 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())
}
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 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.
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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