Trait ColIdx

pub trait ColIdx: Debug + Copy {
    type SqlxSqliteIndex: ColumnIndex<SqliteRow>;

    // Required methods
    fn as_sqlx_sqlite_index(&self) -> Self::SqlxSqliteIndex;
    fn as_str(&self) -> Option<&str>;
    fn as_usize(&self) -> Option<&usize>;
}

Column Index, used by TryGetable. Implemented for &str and usize

Required Associated Types

type SqlxSqliteIndex: ColumnIndex<SqliteRow>

Type surrogate

Required Methods

fn as_sqlx_sqlite_index(&self) -> Self::SqlxSqliteIndex

Basically a no-op; only to satisfy trait bounds

fn as_str(&self) -> Option<&str>

Self must be &str, return None otherwise

fn as_usize(&self) -> Option<&usize>

Self must be usize, return None otherwise

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 ColIdx for &str

type SqlxSqliteIndex = &str

fn as_sqlx_sqlite_index(&self) -> <&str as ColIdx>::SqlxSqliteIndex

fn as_str(&self) -> Option<&str>

fn as_usize(&self) -> Option<&usize>

impl ColIdx for usize

type SqlxSqliteIndex = usize

fn as_sqlx_sqlite_index(&self) -> <usize as ColIdx>::SqlxSqliteIndex

fn as_str(&self) -> Option<&str>

fn as_usize(&self) -> Option<&usize>

Implementors