Enum AttributeValue 

pub enum AttributeValue {
    S(String),
    N(String),
    B(Vec<u8>),
    BOOL(bool),
    NULL(bool),
    SS(Vec<String>),
    NS(Vec<String>),
    BS(Vec<Vec<u8>>),
    L(Vec<AttributeValue>),
    M(HashMap<String, AttributeValue>),
}

DynamoDB AttributeValue — the core type system.

Each variant corresponds to a DynamoDB type descriptor: S (String), N (Number as string), B (Binary), BOOL, NULL, SS (String Set), NS (Number Set), BS (Binary Set), L (List), M (Map).

Variants

S(String)

String type

N(String)

Number type — stored as string per DynamoDB convention

B(Vec<u8>)

Binary type — raw bytes, serialized as base64

BOOL(bool)

Boolean type

NULL(bool)

Null type

SS(Vec<String>)

String Set

NS(Vec<String>)

Number Set — each number stored as string

BS(Vec<Vec<u8>>)

Binary Set — each element is raw bytes

L(Vec<AttributeValue>)

List — ordered collection of AttributeValues

M(HashMap<String, AttributeValue>)

Map — key-value pairs

Implementations

impl AttributeValue

pub fn size(&self) -> usize

Calculate the size of this attribute value in bytes, following DynamoDB’s item size calculation rules.

This does NOT include the attribute name — the caller is responsible for adding the name’s UTF-8 byte length.

pub fn type_name(&self) -> &'static str

Returns the DynamoDB type descriptor string for this value.

pub fn is_scalar(&self) -> bool

Returns true if this is a scalar type (S, N, B, BOOL, NULL).

pub fn is_set(&self) -> bool

Returns true if this is a set type (SS, NS, BS).

pub fn to_key_string(&self) -> Option<String>

Serialize this value to a deterministic TEXT representation for use as a SQLite primary key column (pk or sk).

• S: stored as-is (UTF-8 text sorts correctly)
• N: normalized to a comparable string encoding
• B: hex-encoded (preserves byte ordering)

Trait Implementations

impl Clone for AttributeValue

fn clone(&self) -> AttributeValue

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AttributeValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AttributeValue

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for AttributeValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&[u8]> for AttributeValue

fn from(value: &[u8]) -> Self

Converts to this type from the input type.

impl From<&str> for AttributeValue

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<BTreeSet<String>> for AttributeValue

fn from(value: BTreeSet<String>) -> Self

Converts to this type from the input type.

impl From<HashMap<String, AttributeValue>> for AttributeValue

fn from(value: HashMap<String, AttributeValue>) -> Self

Converts to this type from the input type.

impl From<HashSet<String>> for AttributeValue

fn from(value: HashSet<String>) -> Self

Converts to this type from the input type.

impl From<String> for AttributeValue

fn from(value: String) -> Self

Converts to this type from the input type.

impl From<Vec<AttributeValue>> for AttributeValue

fn from(value: Vec<AttributeValue>) -> Self

Converts to this type from the input type.

impl From<Vec<u8>> for AttributeValue

fn from(value: Vec<u8>) -> Self

Converts to this type from the input type.

impl From<bool> for AttributeValue

fn from(value: bool) -> Self

Converts to this type from the input type.

impl From<i128> for AttributeValue

fn from(value: i128) -> Self

Converts to this type from the input type.

impl From<i16> for AttributeValue

fn from(value: i16) -> Self

Converts to this type from the input type.

impl From<i32> for AttributeValue

fn from(value: i32) -> Self

Converts to this type from the input type.

impl From<i64> for AttributeValue

fn from(value: i64) -> Self

Converts to this type from the input type.

impl From<i8> for AttributeValue

fn from(value: i8) -> Self

Converts to this type from the input type.

impl From<u128> for AttributeValue

fn from(value: u128) -> Self

Converts to this type from the input type.

impl From<u16> for AttributeValue

fn from(value: u16) -> Self

Converts to this type from the input type.

impl From<u32> for AttributeValue

fn from(value: u32) -> Self

Converts to this type from the input type.

impl From<u64> for AttributeValue

fn from(value: u64) -> Self

Converts to this type from the input type.

impl From<u8> for AttributeValue

fn from(value: u8) -> Self

Converts to this type from the input type.

impl PartialEq for AttributeValue

fn eq(&self, other: &AttributeValue) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for AttributeValue

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<AttributeValue> for HashMap<String, AttributeValue>

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for String

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for Vec<AttributeValue>

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for Vec<String>

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for Vec<u8>

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for bool

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for f32

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for f64

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for i128

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for i16

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for i32

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for i64

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for i8

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for u128

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for u16

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for u32

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for u64

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<AttributeValue> for u8

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: AttributeValue) -> Result<Self, ConversionError>

Performs the conversion.

impl TryFrom<f32> for AttributeValue

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: f32) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<f64> for AttributeValue

type Error = ConversionError

The type returned in the event of a conversion error.

fn try_from(value: f64) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for AttributeValue