Trait ColIdx 

pub trait ColIdx: Debug + Copy {
    type SqlxMySqlIndex: ColumnIndex<MySqlRow>;
    type SqlxPostgresIndex: ColumnIndex<PgRow>;
    type SqlxSqliteIndex: ColumnIndex<SqliteRow>;

    // Required methods
    fn as_sqlx_mysql_index(&self) -> Self::SqlxMySqlIndex;
    fn as_sqlx_postgres_index(&self) -> Self::SqlxPostgresIndex;
    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 SqlxMySqlIndex: ColumnIndex<MySqlRow>

Available on crate feature sqlx-mysql only.

Type surrogate

type SqlxPostgresIndex: ColumnIndex<PgRow>

Available on crate feature sqlx-postgres only.

Type surrogate

type SqlxSqliteIndex: ColumnIndex<SqliteRow>

Available on crate feature sqlx-sqlite only.

Type surrogate

Required Methods

fn as_sqlx_mysql_index(&self) -> Self::SqlxMySqlIndex

Available on crate feature sqlx-mysql only.

Basically a no-op; only to satisfy trait bounds

fn as_sqlx_postgres_index(&self) -> Self::SqlxPostgresIndex

Available on crate feature sqlx-postgres only.

Basically a no-op; only to satisfy trait bounds

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

Available on crate feature sqlx-sqlite only.

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 SqlxMySqlIndex = &str

Available on crate feature sqlx-mysql only.

type SqlxPostgresIndex = &str

Available on crate feature sqlx-postgres only.

type SqlxSqliteIndex = &str

Available on crate feature sqlx-sqlite only.

fn as_sqlx_mysql_index(&self) -> Self::SqlxMySqlIndex

Available on crate feature sqlx-mysql only.

fn as_sqlx_postgres_index(&self) -> Self::SqlxPostgresIndex

Available on crate feature sqlx-postgres only.

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

Available on crate feature sqlx-sqlite only.

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

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

impl ColIdx for usize

type SqlxMySqlIndex = usize

Available on crate feature sqlx-mysql only.

type SqlxPostgresIndex = usize

Available on crate feature sqlx-postgres only.

type SqlxSqliteIndex = usize

Available on crate feature sqlx-sqlite only.

fn as_sqlx_mysql_index(&self) -> Self::SqlxMySqlIndex

Available on crate feature sqlx-mysql only.

fn as_sqlx_postgres_index(&self) -> Self::SqlxPostgresIndex

Available on crate feature sqlx-postgres only.

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

Available on crate feature sqlx-sqlite only.

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

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

Implementors