Skip to main content

SqlRead

coven_database

Trait SqlRead 

Source 
pub trait SqlRead {
    // Required methods
    fn query_row<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<T>
       where P: Params,
             F: FnOnce(&Row<'_>) -> Result<T>;
    fn query<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<Vec<T>>
       where P: Params,
             F: FnMut(&Row<'_>) -> Result<T>;
}
Expand description

Ordinary SQL reads through a read context or a write’s, so code that reads the same way inside a write and outside one is written once. Inside a write it sees the write’s own changes.

Required Methods§

Source

fn query_row<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<T>
where P: Params, F: FnOnce(&Row<'_>) -> Result<T>,

Map the first result row.

Source

fn query<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<Vec<T>>
where P: Params, F: FnMut(&Row<'_>) -> Result<T>,

Map all result rows.

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§