Struct Context 

pub struct Context<'a, E: EntityKind> {
    pub db: &'a Db<E::Canister>,
    /* private fields */
}

Context

Fields

db: &'a Db<E::Canister>

Implementations

impl<'a, E> Context<'a, E>

where E: EntityKind,

pub const fn new(db: &'a Db<E::Canister>) -> Self

pub fn with_store<R>(&self, f: impl FnOnce(&DataStore) -> R) -> Result<R, Error>

pub fn with_store_mut<R>( &self, f: impl FnOnce(&mut DataStore) -> R, ) -> Result<R, Error>

pub fn candidates_from_plan( &self, plan: QueryPlan, ) -> Result<Vec<DataKey>, Error>

Analyze Plan

pub fn rows_from_plan(&self, plan: QueryPlan) -> Result<Vec<DataRow>, Error>

pub fn rows_from_plan_with_pagination( &self, plan: QueryPlan, offset: u32, limit: Option<u32>, ) -> Result<Vec<DataRow>, Error>

Fetch rows with pagination applied as early as possible (pre-deserialization), only when no additional filtering or sorting is required by the executor.

pub fn deserialize_rows( &self, rows: Vec<DataRow>, ) -> Result<Vec<(Key, E)>, Error>

Deserialize raw data rows into typed entity rows, mapping DataKey → (Key, E).