Posted: 23/Jan/2024
The expression package in the AWS Go SDK for DynamoDB provides a fluent builder API with types and functions to create expression strings programmatically along with corresponding expression attribute names and values.
Here is an example of how you would build a Projection Expression and use it with the GetItem API:
projectionBuilder:=expression.NamesList(expression.Name("first_name"),expression.Name("last_name"))projectionExpression,_:=expression.NewBuilder().WithProjection(projectionBuilder).Build()_,err:=client.GetItem(context.Background(),&dynamodb.GetItemInput{TableName:aws.String("customer"),Key:map[string]types.AttributeValue{"email":&types.AttributeValueMemberS{Value:"c1@foo.com"},},ProjectionExpression:projectionExpression.Projection(),ExpressionAttributeNames:projectionExpression.Names(),})Recommended reading - expression package API docs