AWS SDK for Go (PILOT)
API Reference

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AddNames

import "github.com/aws/aws-sdk-go/service/dynamodb/expression"

func AddNames(projectionBuilder ProjectionBuilder, namesList ...NameBuilder) ProjectionBuilder

AddNames returns a ProjectionBuilder representing the list of item attribute names equivalent to appending all of the argument item attribute names to the argument ProjectionBuilder. The resulting ProjectionBuilder can be used as a part of other ProjectionBuilders or as an argument to the WithProjection() method for the Builder struct.

Example:

// projection represents the list of names {"foo", "bar", "baz", "qux"} oldProj := expression.NamesList(expression.Name("foo"), expression.Name("bar")) projection := expression.AddNames(oldProj, expression.Name("baz"), expression.Name("qux")) // Used in another Projection Expression anotherProjection := expression.AddNames(projection, expression.Name("quux")) // Used to make an Builder builder := expression.NewBuilder().WithProjection(newProjection)

Expression Equivalent:

expression.AddNames(expression.NamesList(expression.Name("foo"), expression.Name("bar")), expression.Name("baz"), expression.Name("qux")) "foo, bar, baz, qux"

projectionBuilder

ProjectionBuilder represents Projection Expressions in DynamoDB. ProjectionBuilders are the building blocks of Builders. More Information at: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.ProjectionExpressions.html

namesList

NameBuilder represents a name of a top level item attribute or a nested attribute. Since NameBuilder represents a DynamoDB Operand, it implements the OperandBuilder interface. Methods and functions in the package take NameBuilder as an argument and establishes relationships between operands. NameBuilder should only be initialized using the function Name().

Example:

// Create a NameBuilder representing the item attribute "aName" nameBuilder := expression.Name("aName")

ProjectionBuilder

ProjectionBuilder represents Projection Expressions in DynamoDB. ProjectionBuilders are the building blocks of Builders. More Information at: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.ProjectionExpressions.html

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