danielbauman88 / serde_dynamo

DynamoDB is an AWS database that stores key/value and document data.

serde_dynamo provides a way to serialize and deserialize between data stored in these items and strongly-typed Rust data structures.

You may be looking for

• serde_dynamo on crates.io
• serde_dynamo on docs.rs
• serde_dynamo on GitHub

Features

Support for aws-sdk-dynamodb, aws_lambda_events, and rusoto_dynamodb is provided via features. See the docs for more details.

Examples

See the docs for more examples.

Parsing items as strongly-typed data structures.

Items received from a aws-sdk-dynamodb call can be run through from_items.

#[derive(Serialize, Deserialize)]
pub struct User {
    id: String,
    name: String,
    age: u8,
};

// Get documents from DynamoDB
let result = client.scan().table_name("user").send().await?;

// And deserialize them as strongly-typed data structures
if let Some(items) = result.items {
    let users: Vec<User> = from_items(items)?;
    println!("Got {} users", users.len());
}

Alternatively, to deserialize one item at a time, from_item can be used.

for item in result.items.unwrap() {
    let user: User = from_item(item)?;
    println!("{} is {}", user.name, user.age);
}

Creating items by serializing data structures

Writing an entire data structure to DynamoDB typically involves using to_item to serialize it.

#[derive(Serialize, Deserialize)]
pub struct User {
    id: String,
    name: String,
    age: u8,
};

// Create a user
let user = User {
    id: "fSsgVtal8TpP".to_string(),
    name: "Arthur Dent".to_string(),
    age: 42,
};

// Turn it into an item that aws-sdk-dynamodb understands
let item = to_item(user)?;

// And write it!
client.put_item().table_name("users").set_item(Some(item)).send().await?;