forked from awsdocs/aws-doc-sdk-examples
/
DynamoDBUpdateItem.go
86 lines (75 loc) · 2.9 KB
/
DynamoDBUpdateItem.go
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// snippet-comment:[These are tags for the AWS doc team's sample catalog. Do not remove.]
// snippet-sourceauthor:[Doug-AWS]
// snippet-sourcedescription:[DynamoDBUpdateItem.go updates an item in an Amazon DynamoDB table.]
// snippet-keyword:[Amazon DynamoDB]
// snippet-keyword:[UpdateItem function]
// snippet-keyword:[Go]
// snippet-sourcesyntax:[go]
// snippet-service:[dynamodb]
// snippet-keyword:[Code Sample]
// snippet-sourcetype:[full-example]
// snippet-sourcedate:[2019-03-19]
/*
Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
This file is licensed under the Apache License, Version 2.0 (the "License").
You may not use this file except in compliance with the License. A copy of
the License is located at
http://aws.amazon.com/apache2.0/
This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied. See the License for the
specific language governing permissions and limitations under the License.
*/
// snippet-start:[dynamodb.go.update_item]
package main
// snippet-start:[dynamodb.go.update_item.imports]
import (
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/dynamodb"
"fmt"
"log"
)
// snippet-end:[dynamodb.go.update_item.imports]
func main() {
// snippet-start:[dynamodb.go.update_item.session]
// 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)
// snippet-end:[dynamodb.go.update_item.session]
// snippet-start:[dynamodb.go.update_item.call]
// Update item in table Movies
tableName := "Movies"
movieName := "The Big New Movie"
movieYear := "2015"
movieRating := "0.5"
input := &dynamodb.UpdateItemInput{
ExpressionAttributeValues: map[string]*dynamodb.AttributeValue{
":r": {
N: aws.String(movieRating),
},
},
TableName: aws.String(tableName),
Key: map[string]*dynamodb.AttributeValue{
"Year": {
N: aws.String(movieYear),
},
"Title": {
S: aws.String(movieName),
},
},
ReturnValues: aws.String("UPDATED_NEW"),
UpdateExpression: aws.String("set Rating = :r"),
}
_, err := svc.UpdateItem(input)
if err != nil {
log.Fatalf("Got error calling UpdateItem: %s", err)
}
fmt.Println("Successfully updated '" + movieName + "' (" + movieYear + ") rating to " + movieRating)
// snippet-end:[dynamodb.go.update_item.call]
}
// snippet-end:[dynamodb.go.update_item]