26 releases (14 stable)
1.48.0 | Oct 2, 2024 |
---|---|
1.42.0 | Aug 19, 2024 |
1.37.0 | Jul 6, 2024 |
1.19.0 | Mar 21, 2024 |
0.28.0 | May 25, 2023 |
#338 in Database interfaces
991 downloads per month
12KB
182 lines
DynamoDB Type Serializer/Deserializer
Simple Example for Value
-> AttributeValue
use aws_sdk_dynamodb::types::AttributeValue;
use serde_json::{Value, json};
use dynamodb_marshall::dynamodb;
fn main() {
let input: Value = json!({
"hello": "world",
"n": 42,
"some": {
"deep": {
"value": 42
},
},
});
// transform `Value` into a DynamoDB `AttributeValue`
let value: AttributeValue = dynamodb::marshall(&input);
// M({"hello": S("world"), "some": M({"deep": M({"value": N("42")})}), "n": N("42")})
// ... upload value into dynamodb / do stuff
// transform DynamoDB `AttributeValue` into a `Value`
let original: Value = dynamodb::unmarshall(&value);
// Object {"hello": String("world"), "n": Number(42), "some": Object {"deep": Object {"value": Number(42)}}}
// Compare unmarshalled and input
assert_eq!(
input,
original
);
}
For struct
that derive from Serialize, Deserialize
use std::collections::HashMap;
use serde::{Deserialize, Serialize};
use aws_sdk_dynamodb::types::AttributeValue;
use dynamodb_marshall::dynamodb;
#[derive(Serialize, Deserialize, Debug, Default, Eq, PartialEq, Clone)]
struct Example {
hello: String,
world: bool,
something: HashMap<String, String>,
other: u64,
}
fn main() {
let example = Example::default();
// V may fail
let value: AttributeValue = dynamodb::marshall_t(&example).unwrap();
// Turn back to the struct V may fail
let same_example: Example = dynamodb::unmarshall_t::<Example>(&value).unwrap();
assert_eq!(
example,
same_example,
);
}
Dependencies
~15–22MB
~280K SLoC