Trait DatabaseAtRevisionTyped 

pub trait DatabaseAtRevisionTyped: DatabaseAtRevision {
    // Required methods
    fn view_state_as<T>(
        &self,
        name: &StateViewName,
        version: StateViewVersion,
    ) -> impl Future<Output = Result<T, StateViewError>>
       where T: DeserializeOwned;
    fn view_state_opt<T>(
        &self,
        name: &StateViewName,
        version: StateViewVersion,
    ) -> impl Future<Output = Result<Option<T>, StateViewError>>
       where T: DeserializeOwned;
}

Extension trait for typed state view access.

This trait provides convenience methods for fetching state views and automatically deserializing them to typed Rust structs.

Required Methods

fn view_state_as<T>( &self, name: &StateViewName, version: StateViewVersion, ) -> impl Future<Output = Result<T, StateViewError>>

where T: DeserializeOwned,

Fetch a state view and deserialize it to the specified type.

Example

#[derive(Deserialize)]
struct AccountSummary {
    balance: i64,
    transaction_count: u32,
}

let summary: AccountSummary = db
    .view_state_as::<AccountSummary>(&StateViewName::new("account-summary")?, 1)
    .await?;

fn view_state_opt<T>( &self, name: &StateViewName, version: StateViewVersion, ) -> impl Future<Output = Result<Option<T>, StateViewError>>

where T: DeserializeOwned,

Fetch a state view and deserialize it, returning None if not found.

This is useful when the state view might not exist yet (e.g., before any events have been recorded for an entity).

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