Enum dynamodb_expression::value::Value

pub enum Value {
    Scalar(Scalar),
    Set(Set),
    Map(Map),
    List(List),
}

A DynamoDB value

Variants

Scalar(Scalar)

Set(Set)

Map(Map)

List(List)

Implementations

impl Value

pub fn new_string<T>(value: T) -> Self

where T: Into<String>,

Use when you need a string value for DynamoDB.

See also: Scalar::new_string

pub fn new_num<N>(value: N) -> Self

where N: ToString + Num,

Use when you need a numeric value for DynamoDB.

See also:, Value::new_num_lower_exp, Value::new_num_upper_exp, Scalar::new_num, Num::new

Examples

use dynamodb_expression::Value;

let value = Value::new_num(2600);
assert_eq!("2600", value.to_string());

let value = Value::new_num(2600.0);
assert_eq!("2600", value.to_string());

pub fn new_num_lower_exp<N>(value: N) -> Self

where N: LowerExp + Num,

Use when you need a numeric value for DynamoDB in exponent form (with a lowercase e).

See also:, Value::new_num, Value::new_num_upper_exp, Scalar::new_num_lower_exp, Num::new_lower_exp

Examples

use dynamodb_expression::Value;

let value = Value::new_num_lower_exp(2600);
assert_eq!("2.6e3", value.to_string());

let value = Value::new_num_lower_exp(2600.0);
assert_eq!("2.6e3", value.to_string());

pub fn new_num_upper_exp<N>(value: N) -> Self

where N: UpperExp + Num,

Use when you need a numeric value for DynamoDB in exponent form (with an uppercase e).

See also:, Value::new_num, Value::new_num_lower_exp, Scalar::new_num_upper_exp, Num::new_upper_exp

Examples

use dynamodb_expression::Value;

let value = Value::new_num_upper_exp(2600);
assert_eq!("2.6E3", value.to_string());

let value = Value::new_num_upper_exp(2600.0);
assert_eq!("2.6E3", value.to_string());

pub fn new_bool(b: bool) -> Self

Use when you need a boolean value for DynamoDB.

See also: Scalar::new_bool

pub fn new_binary<B>(binary: B) -> Self

where B: Into<Vec<u8>>,

Use when you need a binary value for DynamoDB.

See also: Scalar::new_binary

pub fn new_null() -> Self

Use when you need a null value for DynamoDB.

See also: Scalar::new_null

pub fn new_string_set<T>(string_set: T) -> Self

where T: Into<StringSet>,

See also: Set::new_string_set, StringSet::new

pub fn new_num_set<T>(num_set: T) -> Self

where T: Into<NumSet>,

See also: Set::new_num_set, NumSet::new

pub fn new_binary_set<T>(binary_set: T) -> Self

where T: Into<BinarySet>,

See also: Set::new_binary_set, BinarySet::new

pub fn new_map<T>(map: T) -> Self

where T: Into<Map>,

See also: Map::new

pub fn new_list<T>(list: T) -> Self

where T: Into<List>,

See also: List::new

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl Display for Value

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

Formats the value using the given formatter.

impl From<&&str> for Value

fn from(value: &&str) -> Self

Converts to this type from the input type.

impl From<&String> for Value

fn from(value: &String) -> Self

Converts to this type from the input type.

impl From<&str> for Value

fn from(value: &str) -> Self

Converts to this type from the input type.

impl<const N: usize> From<[u8; N]> for Value

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

Converts to this type from the input type.

impl From<()> for Value

fn from(value: ()) -> Self

Converts to this type from the input type.

impl From<BinarySet> for Value

fn from(string_set: BinarySet) -> Self

Converts to this type from the input type.

impl From<List> for Value

fn from(list: List) -> Self

Converts to this type from the input type.

impl From<Map> for Value

fn from(map: Map) -> Self

Converts to this type from the input type.

impl From<Num> for Value

fn from(value: Num) -> Self

Converts to this type from the input type.

impl From<NumSet> for Value

fn from(num_set: NumSet) -> Self

Converts to this type from the input type.

impl From<Scalar> for Value

fn from(value: Scalar) -> Self

Converts to this type from the input type.

impl From<Set> for Value

fn from(set: Set) -> Self

Converts to this type from the input type.

impl From<String> for Value

fn from(value: String) -> Self

Converts to this type from the input type.

impl From<StringSet> for Value

fn from(string_set: StringSet) -> Self

Converts to this type from the input type.

impl From<Value> for Value

fn from(value: Value) -> Self

Converts a serde_json::Value into a Value.

A shortcoming of this is that serde_json::Value doesn’t contain variants to differentiate between a DynamoDB list and a set. The result is that a serde_json::Value::Array becomes a Value::List.

impl From<Vec<u8>> for Value

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

Converts to this type from the input type.

impl From<bool> for Value

fn from(value: bool) -> Self

Converts to this type from the input type.

impl FromIterator<u8> for Value

fn from_iter<T>(iter: T) -> Self

where T: IntoIterator<Item = u8>,

Creates a value from an iterator.

impl Hash for Value

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Value

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl TryFrom<AttributeValue> for Value

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

On error, the unknown AttributeValue is returned. This will only occur if a new AttributeValue variant is added to the AWS DynamoDB SDK.

See: AttributeValue::Unknown

type Error = AttributeValue

The type returned in the event of a conversion error.

impl Eq for Value

impl StructuralEq for Value

impl StructuralPartialEq for Value