Trait AttributeDefinition 

pub trait AttributeDefinition {
    type Type: AttributeType + AttributeValueRef;

    const NAME: &'static str;
}

Defines the name and type of a single DynamoDB attribute at the type level.

Implementations are generated by attribute_definitions!. Each implementing type is a zero-sized struct that carries:

• NAME — the DynamoDB attribute name as a &'static str.
• Type — one of StringAttribute, NumberAttribute, or BinaryAttribute, indicating the DynamoDB scalar type.

These types serve as type-safe identifiers that connect attribute names and DynamoDB types to your key schemas, item definitions, and query builders.

Examples

use dynamodb_facade::{attribute_definitions, has_attributes, AttributeDefinition, StringAttribute};

attribute_definitions! {
    CourseId { "course_id": StringAttribute }
}


// Use with the has_attributes! or dynamodb_item! macros:
struct MyItem;
has_attributes! {
    MyItem {
        CourseId { const VALUE: &'static str = "COURSE1234"; }
    }
}

// Access the attribute name.
assert_eq!(CourseId::NAME, "course_id");

Required Associated Constants

const NAME: &'static str

The DynamoDB attribute name (e.g. "PK", "email").

Required Associated Types

type Type: AttributeType + AttributeValueRef

The DynamoDB scalar type: StringAttribute, NumberAttribute, or BinaryAttribute.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl AttributeDefinition for Email

const NAME: &'static str = "email"

type Type = StringAttribute

impl AttributeDefinition for Expiration

const NAME: &'static str = "expiration_timestamp"

type Type = NumberAttribute

impl AttributeDefinition for ItemType

const NAME: &'static str = "_TYPE"

type Type = StringAttribute

impl AttributeDefinition for PK

const NAME: &'static str = "PK"

type Type = StringAttribute

impl AttributeDefinition for SK

const NAME: &'static str = "SK"

type Type = StringAttribute