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
Top comments (0)