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macro_rules! rusoto_macro {
(feature = $feature:literal, crate_name = $crate_name:ident, mod_name = $mod_name:ident, rusoto_version = $version:literal,) => {
#[cfg(feature = $feature)]
#[cfg_attr(docsrs, doc(cfg(feature = $feature)))]
pub mod $mod_name {
#![doc = concat!("Support for [rusoto_dynamodb](https://docs.rs/rusoto_dynamodb/", $version, ") version ", $version)]
//!
//! Because [rusoto_dynamodb] has not yet reached version 1.0, a feature is required to
//! enable support. Add the following to your dependencies.
//!
//! ```toml
//! [dependencies]
#![doc = concat!("rusoto_core = { version = ", stringify!($version), ", default-features = false, features = [\"rustls\"] }")]
#![doc = concat!("rusoto_dynamodb = { version = ", stringify!($version), ", default-features = false, features = [\"rustls\"] }")]
#![doc = concat!("serde_dynamo = { version = \"4\", features = [", stringify!($feature), "] }")]
//! ```
//!
//! ## Parsing items as strongly-typed data structures.
//!
//! Items received from a [rusoto_dynamodb] call can be run through [`from_items`].
//!
//! ```
#![doc = concat!("# use ", stringify!($crate_name), "::{DynamoDb, DynamoDbClient, ScanInput};")]
//! # use serde::{Serialize, Deserialize};
//! # use serde_dynamo::from_items;
//! #
//! # async fn scan(client: &DynamoDbClient) -> Result<(), Box<dyn std::error::Error>> {
//! #[derive(Serialize, Deserialize)]
//! pub struct User {
//! id: String,
//! name: String,
//! age: u8,
//! };
//!
//! // Get documents from DynamoDB
//! let input = ScanInput {
//! table_name: "users".to_string(),
//! ..ScanInput::default()
//! };
//! let result = client.scan(input).await?;
//!
//! // And deserialize them as strongly-typed data structures
//! if let Some(items) = result.items {
//! let users: Vec<User> = from_items(items)?;
//! println!("Got {} users", users.len());
//! }
//! # Ok(())
//! # }
//! ```
//!
//! Alternatively, to deserialize one item at a time, [`from_item`] can be used.
//!
//! ```
#![doc = concat!("# use ", stringify!($crate_name), "::{DynamoDb, DynamoDbClient, ScanInput};")]
//! # use serde::{Serialize, Deserialize};
//! # use serde_dynamo::from_item;
//! #
//! # async fn scan(client: &DynamoDbClient) -> Result<(), Box<dyn std::error::Error>> {
//! #[derive(Serialize, Deserialize)]
//! pub struct User {
//! id: String,
//! name: String,
//! age: u8,
//! };
//!
//! // Get documents from DynamoDB
//! let input = ScanInput {
//! table_name: "users".to_string(),
//! ..ScanInput::default()
//! };
//! let result = client.scan(input).await?;
//!
//! // And deserialize them as strongly-typed data structures
//! for item in result.items.unwrap() {
//! let user: User = from_item(item)?;
//! println!("{} is {}", user.name, user.age);
//! }
//! # Ok(())
//! # }
//! ```
//!
//!
//! ## Creating items by serializing data structures
//!
//! Writing an entire data structure to DynamoDB typically involves using [`to_item`] to serialize
//! it.
//!
//! ```
#![doc = concat!("# use ", stringify!($crate_name), "::{DynamoDb, DynamoDbClient, PutItemInput};")]
//! # use serde::{Serialize, Deserialize};
//! # use serde_dynamo::to_item;
//! #
//! # async fn put(client: &DynamoDbClient) -> Result<(), Box<dyn std::error::Error>> {
//! #[derive(Serialize, Deserialize)]
//! pub struct User {
//! id: String,
//! name: String,
//! age: u8,
//! };
//!
//! // Create a user
//! let user = User {
//! id: "fSsgVtal8TpP".to_string(),
//! name: "Arthur Dent".to_string(),
//! age: 42,
//! };
//!
//! // Turn it into an item that rusoto understands
//! let item = to_item(user)?;
//!
//! // And write it!
//! let input = PutItemInput {
//! table_name: "users".to_string(),
//! item: item,
//! ..PutItemInput::default()
//! };
//! client.put_item(input).await?;
//! # Ok(())
//! # }
//! ```
//!
//!
//! ## Using to_attribute_value for more control
//!
//! In some circumstances, building [rusoto_dynamodb::AttributeValue]s directly is required.
//!
//! For example, when generating a key to supply to [get_item].
//!
//! ```
//! use serde_dynamo::to_attribute_value;
#![doc = concat!("# use ", stringify!($crate_name), "::{DynamoDb, DynamoDbClient, GetItemInput};")]
//! # use std::collections::HashMap;
//! #
//! # async fn get(client: &DynamoDbClient) -> Result<(), Box<dyn std::error::Error>> {
//! #
//! # struct User { id: String };
//! # let user = User { id: "fSsgVtal8TpP".to_string() };
//!
//! // Create the unique key of the record in DynamoDB in a way rusoto understands
//! let key = HashMap::from([
//! (String::from("id"), to_attribute_value(&user.id)?),
//! ]);
//!
//! // And get the record
//! let input = GetItemInput {
//! table_name: "users".to_string(),
//! key: key,
//! ..GetItemInput::default()
//! };
//! client.get_item(input).await?;
//! # Ok(())
//! # }
//! ```
//!
//! Or when generating attribute values in a [query] call.
//!
//! ```
//! use serde_dynamo::to_attribute_value;
#![doc = concat!("# use ", stringify!($crate_name), "::{DynamoDb, DynamoDbClient, QueryInput};")]
//! # use std::collections::HashMap;
//! #
//! # async fn query(client: &DynamoDbClient) -> Result<(), Box<dyn std::error::Error>> {
//! # let user_type = "user";
//! # let yesterday = "1985-04-21";
//!
//! // Declare all of the expression inputs for a query call
//! let expression_attribute_values = HashMap::from([
//! (String::from(":user_type"), to_attribute_value(user_type)?),
//! (String::from(":last_login"), to_attribute_value(yesterday)?),
//! ]);
//!
//! // And execute the query
//! let input = QueryInput {
//! table_name: "users".to_string(),
//! index_name: Some("by_type_and_last_login".to_string()),
//! key_condition_expression: Some("user_type = :user_type AND last_login > :last_login".to_string()),
//! expression_attribute_values: Some(expression_attribute_values),
//! ..QueryInput::default()
//! };
//! client.query(input).await?;
//! # Ok(())
//! # }
//! ```
//! [rusoto_dynamodb]: https://docs.rs/rusoto_dynamodb
//! [get_item]: https://docs.rs/rusoto_dynamodb/0.47.0/rusoto_dynamodb/trait.DynamoDb.html#tymethod.get_item
//! [put_item]: https://docs.rs/rusoto_dynamodb/0.47.0/rusoto_dynamodb/trait.DynamoDb.html#tymethod.put_item
//! [query]: https://docs.rs/rusoto_dynamodb/0.47.0/rusoto_dynamodb/trait.DynamoDb.html#tymethod.query
//! [rusoto_dynamodb::AttributeValue]: https://docs.rs/rusoto_dynamodb/0.47.0/rusoto_dynamodb/struct.AttributeValue.html
use crate::Result;
use ::$crate_name::AttributeValue;
impl From<crate::AttributeValue> for AttributeValue {
fn from(attribute_value: crate::AttributeValue) -> Self {
match attribute_value {
crate::AttributeValue::N(n) => AttributeValue{ n: Some(n), ..Default::default() },
crate::AttributeValue::S(s) => AttributeValue { s: Some(s), ..Default::default() },
crate::AttributeValue::Bool(b) => AttributeValue { bool: Some(b), ..Default::default() },
crate::AttributeValue::B(v) => AttributeValue { b: Some(v.into()), ..Default::default() },
crate::AttributeValue::Null(null) => AttributeValue { null: Some(null), ..Default::default() },
crate::AttributeValue::M(item) => AttributeValue { m: Some(item.into_iter().map(|(key, attribute_value)|
(key, AttributeValue::from(attribute_value))
).collect()), ..Default::default() },
crate::AttributeValue::L(list) => AttributeValue { l: Some(list.into_iter().map(AttributeValue::from).collect()), ..Default::default() },
crate::AttributeValue::Ss(ss) => AttributeValue { ss: Some(ss), ..Default::default() },
crate::AttributeValue::Ns(ns) => AttributeValue { ns: Some(ns), ..Default::default() },
crate::AttributeValue::Bs(bs) => AttributeValue { bs: Some(bs.into_iter().map(Into::into).collect()), ..Default::default() },
}
}
}
impl From<AttributeValue> for crate::AttributeValue {
fn from(attribute_value: AttributeValue) -> crate::AttributeValue {
if let Some(n) = attribute_value.n { crate::AttributeValue::N(n) }
else if let Some(s) = attribute_value.s { crate::AttributeValue::S(s) }
else if let Some(b) = attribute_value.bool { crate::AttributeValue::Bool(b) }
else if let Some(v) = attribute_value.b { crate::AttributeValue::B(v.to_vec()) }
else if let Some(null) = attribute_value.null { crate::AttributeValue::Null(null) }
else if let Some(item) = attribute_value.m { crate::AttributeValue::M(item.into_iter().map(|(key, attribute_value)| (key, crate::AttributeValue::from(attribute_value))).collect()) }
else if let Some(list) = attribute_value.l { crate::AttributeValue::L(list.into_iter().map(crate::AttributeValue::from).collect()) }
else if let Some(ss)= attribute_value.ss { crate::AttributeValue::Ss(ss) }
else if let Some(ns)= attribute_value.ns { crate::AttributeValue::Ns(ns) }
else if let Some(bs)= attribute_value.bs { crate::AttributeValue::Bs(bs.into_iter().map(|b| b.to_vec()).collect()) }
else {
panic!("Unexpectedly did not match any possible data types")
}
}
}
/// A version of [`crate::to_attribute_value`] where the `AV` generic is tied to
/// [`rusoto_dynamodb::AttributeValue`](AttributeValue).
///
/// Useful in very generic code where the type checker can't determine the type of
/// `AV`.
pub fn to_attribute_value<T>(value: T) -> Result<AttributeValue>
where
T: serde_core::ser::Serialize,
{
crate::ser::to_attribute_value(value)
}
/// A version of [`crate::to_item`] where the `AV` generic is tied to
/// [`rusoto_dynamodb::AttributeValue`](AttributeValue).
///
/// Useful in very generic code where the type checker can't determine the type of
/// `AV`.
pub fn to_item<T>(value: T) -> Result<std::collections::HashMap<String, AttributeValue>>
where
T: serde_core::ser::Serialize,
{
crate::ser::to_item(value)
}
/// A version of [`crate::from_attribute_value`] where the `AV` generic is tied to
/// [`rusoto_dynamodb::AttributeValue`](AttributeValue).
///
/// Useful in very generic code where the type checker can't determine the type of
/// `AV`.
pub fn from_attribute_value<'a, T>(attribute_value: AttributeValue) -> Result<T>
where
T: serde_core::de::Deserialize<'a>,
{
crate::de::from_attribute_value(attribute_value)
}
/// A version of [`crate::from_item`] where the `AV` generic is tied to
/// [`rusoto_dynamodb::AttributeValue`](AttributeValue).
///
/// Useful in very generic code where the type checker can't determine the type of
/// `AV`.
pub fn from_item<'a, T>(
item: std::collections::HashMap<String, AttributeValue>,
) -> Result<T>
where
T: serde_core::de::Deserialize<'a>,
{
crate::de::from_item(item)
}
/// A version of [`crate::from_items`] where the `AV` generic is tied to
/// [`rusoto_dynamodb::AttributeValue`](AttributeValue).
///
/// Useful in very generic code where the type checker can't determine the type of
/// `AV`.
pub fn from_items<'a, T>(
items: Vec<std::collections::HashMap<String, AttributeValue>>,
) -> Result<Vec<T>>
where
T: serde_core::de::Deserialize<'a>,
{
crate::de::from_items(items)
}
}
#[cfg(feature = $feature)]
#[doc(hidden)]
#[deprecated(since = "4.0.0", note = "The double-underscore is no longer necessary")]
pub mod $crate_name {
use crate::Result;
use ::$crate_name::AttributeValue;
#[deprecated(since = "4.0.0", note = "The double-underscore on the mod name is no longer necessary")]
pub fn to_attribute_value<T>(value: T) -> Result<AttributeValue>
where
T: serde_core::ser::Serialize,
{
crate::ser::to_attribute_value(value)
}
#[deprecated(since = "4.0.0", note = "The double-underscore on the mod name is no longer necessary")]
pub fn to_item<T>(value: T) -> Result<std::collections::HashMap<String, AttributeValue>>
where
T: serde_core::ser::Serialize,
{
crate::ser::to_item(value)
}
#[deprecated(since = "4.0.0", note = "The double-underscore on the mod name is no longer necessary")]
pub fn from_attribute_value<'a, T>(attribute_value: AttributeValue) -> Result<T>
where
T: serde_core::de::Deserialize<'a>,
{
crate::de::from_attribute_value(attribute_value)
}
#[deprecated(since = "4.0.0", note = "The double-underscore on the mod name is no longer necessary")]
pub fn from_item<'a, T>(
item: std::collections::HashMap<String, AttributeValue>,
) -> Result<T>
where
T: serde_core::de::Deserialize<'a>,
{
crate::de::from_item(item)
}
#[deprecated(since = "4.0.0", note = "The double-underscore on the mod name is no longer necessary")]
pub fn from_items<'a, T>(
items: Vec<std::collections::HashMap<String, AttributeValue>>,
) -> Result<Vec<T>>
where
T: serde_core::de::Deserialize<'a>,
{
crate::de::from_items(items)
}
}
};
}
pub(crate) use rusoto_macro;