Trait Queryable

trait Queryable {
    // Required methods
    fn query_map_one<T, F>(
        &self,
        sql: &str,
        params: &[&dyn ToSql],
        f: F,
    ) -> Result<Option<T>>
       where F: FnOnce(&Row<'_, '_>) -> T;
    fn query_map_many<T, F>(
        &self,
        sql: &str,
        params: &[&dyn ToSql],
        f: F,
    ) -> Result<Vec<T>>
       where F: FnMut(&Row<'_, '_>) -> T;
    fn exists(&self, sql: &str, params: &[&dyn ToSql]) -> bool;
    fn get_last_id(&self) -> Option<i32>;
    fn reconnect_concrete(config: &Config) -> Self;
}

Required Methods

fn query_map_one<T, F>( &self, sql: &str, params: &[&dyn ToSql], f: F, ) -> Result<Option<T>>

where F: FnOnce(&Row<'_, '_>) -> T,

fn query_map_many<T, F>( &self, sql: &str, params: &[&dyn ToSql], f: F, ) -> Result<Vec<T>>

where F: FnMut(&Row<'_, '_>) -> T,

fn exists(&self, sql: &str, params: &[&dyn ToSql]) -> bool

fn get_last_id(&self) -> Option<i32>

fn reconnect_concrete(config: &Config) -> Self

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.

Implementations on Foreign Types

impl Queryable for Connection

fn query_map_one<T, F>( &self, sql: &str, params: &[&dyn ToSql], f: F, ) -> Result<Option<T>>

where F: FnOnce(&Row<'_, '_>) -> T,

fn query_map_many<T, F>( &self, sql: &str, params: &[&dyn ToSql], f: F, ) -> Result<Vec<T>>

where F: FnMut(&Row<'_, '_>) -> T,

fn exists(&self, sql: &str, params: &[&dyn ToSql]) -> bool

fn get_last_id(&self) -> Option<i32>

fn reconnect_concrete(config: &Config) -> Self

Implementors