Trait CounterCache 

pub trait CounterCache: Record {
    // Required method
    fn counter_cache_columns() -> &'static [(&'static str, &'static str)];

    // Provided methods
    async fn increment_counter(
        column: &str,
        id: i64,
        db: &DatabaseConnection,
    ) -> Result<(), RecordError> { ... }
    async fn decrement_counter(
        column: &str,
        id: i64,
        db: &DatabaseConnection,
    ) -> Result<(), RecordError> { ... }
}

Counter cache helpers for record types.

Required Methods

fn counter_cache_columns() -> &'static [(&'static str, &'static str)]

Returns the available counter cache columns as (column, association) pairs.

Provided Methods

async fn increment_counter( column: &str, id: i64, db: &DatabaseConnection, ) -> Result<(), RecordError>

Increments a counter cache column for the record identified by id.

async fn decrement_counter( column: &str, id: i64, db: &DatabaseConnection, ) -> Result<(), RecordError>

Decrements a counter cache column for the record identified by id.

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