Creating an Amazon DynamoDB Table Item

The following example uses the DynamoDB PutItem operation to create the table item with the year 2015 and title The Big New Movie in the Movies table in your default region.

Create the file DynamoDBCreateItem.go. Add the following statements to import the Go and AWS SDK for Go packages used in the example.

import (
    "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"

    "fmt"
    "log"
    "strconv"
)

Create the data structure we use to containing the information about the table item.

// Create struct to hold info about new item
type Item struct {
    Year   int
    Title  string
    Plot   string
    Rating float64
}

Initialize a session that the SDK will use to load credentials from the shared credentials file ~/.aws/credentials and region from the shared configuration file ~/.aws/config, and create the DynamoDB client.

// Initialize a session that the SDK will use to load
// credentials from the shared credentials file ~/.aws/credentials
// and region from the shared configuration file ~/.aws/config.
sess := session.Must(session.NewSessionWithOptions(session.Options{
    SharedConfigState: session.SharedConfigEnable,
}))

// Create DynamoDB client
svc := dynamodb.New(sess)

Create a struct with the movie data and marshall that data into a map of AttributeValue objects.

item := Item{
    Year:   2015,
    Title:  "The Big New Movie",
    Plot:   "Nothing happens at all.",
    Rating: 0.0,
}

av, err := dynamodbattribute.MarshalMap(item)
if err != nil {
    log.Fatalf("Got error marshalling new movie item: %s", err)
}

Create the input for PutItem and call it. If an error occurs, print the error and exit. If no error occurs, print an message that the item was added to the table.

// Create item in table Movies
tableName := "Movies"

input := &dynamodb.PutItemInput{
    Item:      av,
    TableName: aws.String(tableName),
}

_, err = svc.PutItem(input)
if err != nil {
    log.Fatalf("Got error calling PutItem: %s", err)
}

year := strconv.Itoa(item.Year)

fmt.Println("Successfully added '" + item.Title + "' (" + year + ") to table " + tableName)

See the complete example on GitHub.