dynamizer

Documentation

Index

• func FromDynamo(item DynamoItem, v interface{}) (err error)
• type DynamoAttribute
• type DynamoItem
  • func ToDynamo(in interface{}) (item DynamoItem, err error)

Functions

func FromDynamo

func FromDynamo(item DynamoItem, v interface{}) (err error)

FromDynamo takes a map of DynamoDB attributes and converts it into a map or struct in basic JSON format.

If v points to a struct, we first convert it to a basic map, then JSON encode/decode it to convert to a struct. This can/should be optimized later.

Types

type DynamoAttribute

type DynamoAttribute struct {
	S    *string                     `json:",omitempty"` // pointer so we can represent the zero-value
	N    string                      `json:",omitempty"`
	BOOL *bool                       `json:",omitempty"` // pointer so we can represent the zero-value
	NULL bool                        `json:",omitempty"`
	M    map[string]*DynamoAttribute `json:",omitempty"`
	L    []*DynamoAttribute          `json:",omitempty"`
}

A DynamoAttribute represents the union of possible DynamoDB attribute values. See http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_AttributeValue.html

Since the intention is to use this with JSON documents (or structs representing JSON documents), the binary and set types have been omitted.

type DynamoItem

type DynamoItem map[string]*DynamoAttribute

A DynamoItem represents a the top level item stored in DyanmoDB.

func ToDynamo

func ToDynamo(in interface{}) (item DynamoItem, err error)

ToDynamo accepts a map or struct in basic JSON format and converts it to a map which can be JSON-encoded into the DynamoDB format.

If in is a struct, we first JSON encode/decode it to get the data as a map. This can/should be optimized later.